Top 50 Android Interview Questions with Answers

Android Interview Questions with Answers

1. What is an Android?

a. A smartphone
b. A mobile operating system
c. A type of app
d. All of the above

Answer: b

2. What is an APK file?

a. A file format for Windows operating system
b. A file format for iOS operating system
c. A file format for Android operating system
d. None of the above

Answer: c

3. What is an Intent in Android?

a. A class
b. A message passing mechanism
c. An interface
d. A layout

Answer: b

4. Which of the following is a base class for Android layouts?

a. Object
b. View
c. ViewGroup
d. All of the above

Answer: c

5. What is the name of the Android debugger?

a. Android Debug Bridge (ADB)
b. Android Debug Framework (ADF)
c. Android Debug Module (ADM)
d. None of the above

Answer: a

6. Which of the following is not a permission in Android?


Answer: d

7. Which of the following is a thread-safe data structure in Android?

a. HashTable
b. ArrayList
c. LinkedList
d. None of the above

Answer: a

8. Which of the following is a type of broadcast in Android?

a. Ordered Broadcast
b. Normal Broadcast
c. Instant Broadcast
d. All of the above

Answer: a

9. What is the name of the Android virtual machine?

a. JVM
b. Dalvik VM
d. None of the above

Answer: b

10. What is the difference between startActivity() and startActivityForResult()?

a. startActivity() is used to start a new activity and startActivityForResult() is used to start an activity for getting a result from it
b. startActivity() is used for getting a result from an activity and startActivityForResult() is used to start a new activity
c. Both startActivity() and startActivityForResult() are used for starting a new activity
d. None of the above

Answer: a

11. What is an ANR in Android?

a. Application Not Responding
b. Android Notification Response
c. Authorized Network Request
d. Advanced Notification Routing

Answer: a

12. Which of the following is a class for storing user preferences in Android?

a. Intent
b. Bundle
c. ContentProvider
d. SharedPreferences

Answer: d

13. What is the use of “adb logcat” command in Android?

a. It shows the log messages of the device
b. It starts the Android emulator
c. It installs an app on the device
d. None of the above

Answer: a

14. Which of the following component is responsible for managing the application’s preferences?

a. Activity
b. Service
c. ContentProvider
d. PreferenceActivity

Answer: d

15. Which of the following is a storage class for key-value pairs in Android?

a. Bundle
b. Intent
c. ContentValues
d. None of the above

Answer: c

16. What is the use of “adb shell” command in Android?

a. It starts the Android emulator
b. It installs an app on the device
c. It opens a shell on the device
d. None of the above

Answer: c

17. Which of the following is not an Android component?

a. Activity
b. Service
c. ContentProvider
d. Fragment

Answer: d

18. What is the difference between “match_parent” and “wrap_content” in Android layouts?

a. “match_parent” fills the parent element and “wrap_content” wraps the content
b. “match_parent” wraps the content and “wrap_content” fills the parent element
c. Both “match_parent” and “wrap_content” fill the parent element
d. None of the above

Answer: a

19. What is the name of the Android package manager?

a. PackageManager
b. PackageInstaller
c. PackageManagerService
d. None of the above

Answer: a

20. What is the use of “adb push” command in Android?

a. It pulls a file from the device to the computer
b. It pushes a file from the computer to the device
c. It installs an app on the device
d. None of the above

Answer: b

21. Which of the following is used for storing and retrieving data in Android applications?

a. SQLite database
b. MySQL database
c. Oracle database
d. None of the above

Answer: a

22. What is the use of “adb pull” command in Android?

a. It pulls a file from the device to the computer
b. It pushes a file from the computer to the device
c. It installs an app on the device
d. None of the above

Answer: a

23. Which of the following is a class for creating a database and tables in Android?

a. SQLiteOpenHelper
b. SQLiteDatabase
c. SQLiteManager
d. None of the above

Answer: a

24. What is the name of the Android layout that includes other layouts?

a. LinearLayout
b. RelativeLayout
c. FrameLayout
d. None of the above

Answer: b

25. Which of the following is a class for managing the media playback in Android?

a. AudioManager
b. MediaPlayer
c. MediaRecorder
d. None of the above

Answer: b

26. Which of the following is a class for creating and managing notifications in Android?

a. Notification
b. NotificationManager
c. NotificationChannel
d. All of the above

Answer: d

27. What is the use of “adb install” command in Android?

a. It pulls a file from the device to the computer
b. It pushes a file from the computer to the device
c. It installs an app on the device
d. None of the above

Answer: c

28. Which of the following is a class for creating animations in Android?

a. Animation
b. Animator
c. AnimationDrawable
d. All of the above

Answer: d

29. Which of the following is a class for creating and managing threads in Android?

a. Thread
b. HandlerThread
c. AsyncTask
d. All of the above

Answer: d

30. What is the name of the Android UI toolkit?

a. Android UI Toolkit (AUIT)
b. Android User Interface Framework (AUIF)
c. Android Widget Toolkit (AWT)
d. None of the above

Answer: d

31. Which of the following is a class for creating and managing alarms in Android?

a. Alarm
b. AlarmManager
c. Reminder
d. None of the above

Answer: b

32. Which of the following is a class for creating and managing contacts in Android?

a. Contact
b. ContactManager
c. ContentProvider
d. None of the above

Answer: c

33. Which of the following is a class for creating and managing SMS messages in Android?

a. SMS
b. SMSManager
c. SMSProvider
d. None of the above

Answer: b

34. What is the use of “adb logcat -c” command in Android?

a. It shows the log messages of the device
b. It starts the Android emulator
c. It clears the log messages
d. None of the above

Answer: c

35. Which of the following is a class for creating and managing dialog boxes in Android?

a. Dialog
b. AlertDialog
c. ProgressDialog
d. All of the above

Answer: d

36. What is the name of the Android graphical user interface builder?

a. Android Studio
b. Eclipse
c. IntelliJ IDEA
d. None of the above

Answer: a

37. What is the use of “adb logcat -f ” command in Android?

a. It shows the log messages of the device
b. It starts the Android emulator
c. It saves the log messages to a file
d. None of the above

Answer: c

38. Which of the following is a class for creating and managing the wifi in Android?

a. Wifi
b. WifiManager
c. ConfigurationManager
d. None of the above

Answer: b

39. What is the name of the Android graphics rendering engine?

a. Canvas
b. OpenGL ES
c. Skia
d. None of the above

Answer: c

40. Which of the following is a class for creating and managing sensors in Android?

a. Sensor
b. SensorEvent
c. SensorManager
d. All of the above

Answer: d

41. What is the use of “adb reboot” command in Android?

a. It shows the log messages of the device
b. It reboots the Android device
c. It installs an app on the device
d. None of the above

Answer: b

42. Which of the following is a class for creating and managing a webview in Android?

a. WebView
b. Browser
c. WebKit
d. None of the above

Answer: a

43. What is the name of the Android application package file?

a. APK
b. JAR
c. WAR
d. None of the above

Answer: a

44. Which of the following is a class for creating and managing the layout of a ListView in Android?

a. ArrayAdapter
b. SimpleAdapter
c. CursorAdapter
d. All of the above

Answer: d

45. Which of the following is a class for creating and managing the layout of a RecyclerView in Android?

a. RecyclerViewAdapter
b. ItemAdapter
c. RecyclerViewManager
d. None of the above

Answer: a

46. What is the use of “adb devices” command in Android?

a. It shows the list of devices attached to the computer
b. It lists the applications installed on the device
c. It installs an app on the device
d. None of the above

Answer: a

47. Which of the following is a class for creating and managing animations with multiple frames in Android?

a. FrameAnimation
b. AnimationSet
c. StateListAnimator
d. None of the above

Answer: a

48. What is the use of “adb shell pm uninstall” command in Android?

a. It pulls a file from the device to the computer
b. It pushes a file from the computer to the device
c. It uninstalls an app from the device
d. None of the above

Answer: c

49. Which of the following is a class for creating and managing tabbed activities in Android?

a. TabLayout
b. TabActivity
c. FragmentTabHost
d. All of the above

Answer: d

50. What is the use of “adb forward” command in Android?

a. It forwards a local TCP port to the device
b. It forwards a remote TCP port to the device
c. It installs an app on the device
d. None of the above

Answer: a

Complete guide of Android App Developer certification courses, tutorials, and training


Create your 1st android Application, learn to rectify the applying, and learn the way to make a signed APK that you just will have in the play store. operating with implicit and express intents. an in-depth example of the way to work with Fragments. Learn some customizations sort of a custom ListView, Toast, TextView, and ActionBar.

What does an Android app developer do?

An android developer is responsible for developing applications for devices high-powered by the automation software system. Because of the fragmentation of this system, an automaton developer should pay special attention to the application’s compatibility with multiple versions of automaton and device varieties.

Why do we need android app development?

The reason android rules the app market is its ability to run on additional devices than its competitors. Makers that build devices supporting android apps total those developing to suit iOS-specific apps. Thus, android application development is evidenced to be the wiser and additional profitable possibility.

How are android app developers so popular?

Android’s openness has created it a favorite for shoppers and developers alike, driving strong growth in app consumption. Download users transfer billions of apps and games from Google Play every month.

Skills that required for Android Developer:

  • Expertise in Java, Kotlin, or Both.
  • Vital Android SDK concepts.
  • Decent Experience with SQL.
  • Knowledge of Git.
  • XML Basics.
  • Understanding of Material Design Guidelines.
  • Android Studio.
  • Backend Programming Skills.

List of Best Android Frameworks for App Development in 2021

Ionic Android Framework

Founded in 2012, Ionic is taken into account as one of the foremost standard cross-platform development frameworks. It is a free, open-source framework certified by MIT that allows developers to use modern web technologies including HTML5, CSS3, and JavaScript.

React Native Android Framework

The platform started out as an inside hackathon project at Facebook back in 2013. In 2015, it was released as an open-source cross-platform development framework. It permits developers to leverage React, a versatile JavaScript library to make apps for each android and iOS. Since it is developed by Facebook, it is regarded as one of the best open-source software for mobile development.

Flutter Android Framework

Flutter may be a new law office in the city however has already created a reputation for itself in Google Ads. It’s a free open-source mobile UI SDK framework built and developed by Google for building applications in a different approach compared to other Android app frameworks. It simplifies the multi-platform development technique to craft wonderful native interfaces on Android and iOS quickly. Flutter is written within the Dart language and works with existing code to assist developers in mobile app development.

Native Android Framework

Native Android development platforms just like the several others we’ve got already mentioned additionally star among a number of the world’s most well-liked mobile development frameworks. The SDK provides developers with API libraries and developer tools necessary to make, test, and right sensible apps for the Android Platform.

Xamarin Android Framework

Xamarin is yet another must-try mobile app development framework for developers. It is an open-source platform for building stylish and performant applications for iOS, Android, and Windows. (NET) within the survey mentioned on top of React Native, Xamarin was the 10th most well-liked cross-platform application development framework and also the 15th most admired framework. Surprisingly not like React Native, developers don’t dread the maximum amount.

NativeScript Android Framework

If you would like to accelerate your mobile app development, NativeScript SDK is associated with another nice selection for an app development framework that’s listed among the simplest hybrid app framework. Backed by a Bulgarian software package company, Telerik, and fully free, it provides app developers with an associate open-source framework for building actually native mobile apps with Angular, Vue.js, JavaScript, or TypeScript while sharing the application code across platforms.

JQuery Mobile Android Framework

The Query Mobile framework takes the “write less, do more” chant to the succeeding level. What this suggests is that you simply will write your code once, and it’ll execute it on much any of the specified platforms albeit you’re building apps on Windows Phones, Symbian, and Blackberry.

Framework7 Android Framework

The newest in town, Framework7 is a full-featured android development platform designed to help developers build Android, iOS, and Desktop apps. It is a free and open-source mobile HTML framework and all you need to make it work is a simple HTML layout and associated framework’s CSS and JS files.

Corona SDK Android Framework

Corona SDK is that the world’s most advanced 2D mobile development platform. The cross-platform development framework is free-to-use to form apps and games for mobile, desktop, and connected TV devices on one codebase. It leverages Lua scripting language, incorporates quite one thousand internal genus Apis, an outsized style of plugins, and Corona Native extensions that assist you to create your app development into a reality.

Appcelerator Titanium Android Framework

Lastly is that the Appcelerator titanium SDK is additionally one of the foremost in style cross-platform mobile development solutions in use these days. just like the rest we’ve checked out, it’s a free and open-source application development platform that permits developers to make native apps victimization internet technologies like HTML, JavaScript, and CSS while not having to understand Java or Objective-C. It’s simple to use and then widespread that 100% of mobile phones within the world are calculable to run apps created with titanium. The platform uses JavaScript to make native code so as to enhance performance.

Scope for Android App developer

  1. Open Source

Android is an open-source OS. It helps the developer to register once then they will develop and check completely different apps. On android SDK one-time registration fee is $25 to induce a developer account on Google play that helps you to publish multiple android apps. For paid apps, Google charges a half-hour commission and without charge apps, they’re distributed free among all users.

2. Huge Market

The mobile app market is that the quickest growing app market in India. android developers will publish their apps on different platforms like SlideME, Opera Mobile Store, Mobango, etc. Most of those platforms or markets are free. Such platforms are making a large marketplace for android mobile app development in India.

3. High Return on Investment with Low Cost

Developers will use the android software system Development Kit. they need to pay one time for registration rest will build multiple apps. They will purchase any pc device to create and check their application, by this, they invest less and increase user engagement. therefore end-users are benefited victimization interactive apps and also the company gains a high come-on investment.

4. User Base is Larger

As mentioned before android includes a sizable amount of users and it continues to grow. So corporations are becoming benefited from this range. Android permits you to develop apps and games for a lot of users. So reaching a bigger range of users offers you the perception of the market.

5. Job Opportunities for Android Developer

As the market is larger for android, jobs for android mobile app development are increasing in India. Developers who are knowledgeable and experienced will have an honest payment package throughout this trade. Approx. 25000 openings are there for android mobile app development in India, the number itself shows the huge amount of growth throughout this trade. for knowledgeable developer’s payment lies between Rs 1.2 to 4.6 lakh once a year.

6. Banking

Prime Minister Narendra Modi’s Announcement of Digital India has bought tons of changes in India. Cashless India has accrued online banking transactions, with this increase banking applications is been in demand. All banks are able to pay high to experienced developers. Maintaining and publication a banking app isn’t simple because it wants several security checks like customer’s info shouldn’t be leaked. Also, apps like Paytm, Bhim app, Phone pe app, etc are being in demand today.

7. Educational

With digitalized India, several instructional industries have gotten updated with online courses. these days it’s been simple for elders as well as for youngsters to find out with online courses wherever ever they’re they will access the net course and learn new things. Few Examples are; Udemy, Byju’s, TED, etc area unit all android instructional apps.

8. Gaming

Who doesn’t prefer to play games, principally game is likable by kids and Youngsters? pub G game has become famous among kids recently. a requirement for the gaming sector for android mobile applications is additionally booming these days in India. The vice sector is giving the very best ROI in India.

9. E-commerce

The E-commerce trade in India was expected to try and do sales of $32.70 billion in 2018. principally client prefers to shop for through the mobile application as several massive corporations like Amazon and Flipkart sometimes offers large discounts on apps.

Android App Developer Training and Certification

DevOpsSchool designed the simplest android app development courses and training programs for your level and desires. you’ll gain the power to make a prime android application victimization current best practices, beginning with android development.

After the android development course, you’ll build apps for the foremost standard mobile software within the world. during this training program, you’ll find out about android, came upon your android development surroundings, and build your 1st android app victimization Kotlin, and making a brand new Android Studio project, building your app, and putting in it to an imitator to check, loading and displaying of remote information victimization the GitHub API.

What are the benefits of “Android App” Certification?

Certifications forever play an important role in any profession. you’ll realize some android App professionals, who can tell you that certifications don’t hold a lot of value; This certification demonstrates an individual’s ability to generate complicated searches, reports, and dashboards with android App’s core software system to induce the foremost out of their information.

An android App Core Certified User will search, use fields, use lookups, and build basic applied math reports and dashboards within the android App Enterprise or android App Cloud Platforms. This certification demonstrates an individual’s ability to navigate and use the android App software system.

Agenda of the Android App Developer


There are 2.8 billion or a lot of apps on the play store. With the rise in the use of smartphones, everybody wants everything on mobile be it education or searching. Nearly 65th of searchers shop through an app in India. so to conclude I might say android mobile applications are going to be in demand each in India also as abroad.

Thank you!

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How to Become an Android App Developer?

Android is an open-source operating system, based on the Linux kernel and used in mobile devices like smartphones, tablets, etc. Various applications like games, music player, camera, etc. are built for these smartphones for running on Android. Google Play Store features quite 3.3 million apps.

You must admit that learning Android app development isn’t easy as it look. For the non-programmer there are several steps in the process, and even experienced programmers have quite a bit to learn when adopting Android. If you’re interested in developing new and innovative applications for the world’s #1 mobile platform – here are my six steps to becoming an Android app developer.

Now the questions arise are, Why Android? How to start? Where to start? And many more Question like this. So in this particular blog we will discuss in all this topics and I will try best to answer them all. Let’s start-

Who is an Android App Developer?

An Android App Developer is a Software Developer expertise in designing applications for the Android for mobile platform. This is the only competitor to Apple’s app store. Their job revolves around creating the apps we use on our smartphones and tablets. It is a skilled, entry-level position.

According to the recent studies, demand for Software Developers, which includes Android Developers, is expected to rise a whopping 21 percent through 2024. As an Android developer, you need to be very clear with your job posting and your responsibilities. So, here are some key roles and responsibilities of an Android Developer, that define who can be a successful developer.

These roles and responsibilities define who can be a successful developer.

There are several of specific tasks that an Android app Developer execute to develop Android applications. There are some of the following duties of Android app Developer-

Design and Build Advanced Applications for the Android Platform

In this an Android Developer dedicates most of their time. This development includes of using C / C++, JavaScript and a few other tools to write program code. It requires extreme attention, because one mistyped line of code can spoil the whole program.

Collaborate with Cross-Functional Teams to Define, Design and Ship New Features

An Android App Developer works with Product Development, User Experience and several other departments to define and design new features that users actually want.

Troubleshoot and Fix Bugs in New and as well as on Existing Applications

An Android App Developer’s job isn’t done after an application is completed. In fact they are also responsible for troubleshooting bugs that arise when the app is shipped to users in near future.

Continuously Discover, Evaluate and Implement New Development Tools

Android App Developers have to be up to date by latest trends in mobile application. They have to discover new tools as they hit the market. This requires the ability to adapt to an ever-changing environment.

Work With Outside Data Sources and APIs

An Android App developer spends so much amount of time working with outside data sources and APIs that provided.

How to become an Android App Developer?

Android App Developers can follow an easy pathway to become a successful Android App Developer as they already have an idea about how the applications work.  However, If you are someone, want to start your journey towards becoming an Android App Developer and really gain an advantage in the job market, then start working on these advanced skills many employers prefer in their Android App Developers career-

  • Should have strong knowledge of Android SDK and different versions of Android.
  • Proficient in programming languages like Java/Kotlin.
  • Strong knowledge of Android UI design principles, patterns, and best practices.
  • Decent knowledge with SQL.
  • Proficient understanding of code versioning tools, such as Git.
  • Familiarity with RESTful APIs that connects Android applications to back-end services.
  • Experience working with offline storage, threading, and performance tuning.
  • Possess the ability to design applications around UI such as touch.
  • Ability to understand business requirements and translate them into technical requirements.
  • Familiarity with cloud message APIs and push notifications.
  • Understanding of Google’s Android design principles and interface guidelines.
  • Familiarity with continuous integration.

At last, mastering these skills will definitely help you grow as a successful Android App Developer. And also do note that Android is one such domain where jobs are never out of stock. So start now to be an amazing developer.

Job roles

  • Mobile App Developer
  • Android Engineer
  • Mobile Architect
  • Embedded Software Engineer – Mobile
  • Lead Software Engineer- Mobile
  • Android Developer
  • Android Engineer
  • Mobile Developer

Why you should choose Android App Developer as a Career?

There are so many reasons why you should go for Android Development. Some notable ones among them are listed below:


According to the recent studies, the national avg. salary for Software Developers, which includes Android Developers, is $109,300. Those in the bottom 10 percent make less than $57,300, while those in the top 10 percent make more than $183,700. The three states with the highest median salary for Android Developers are California at $128,700, Washington at $123,400 and Massachusetts at $113,600.

Android is an evolving platform

Applications that are created are gaining lot of popularity and are rated top on the Google play store. With the time, Google keeps changing certain functionalities and releasing the new versions. So, you get updates yourself on a regular basis to improvised features that are added to your application. This is also a challenging task to develop, something that can catch the eye of any user.

Easy to learn

The developers out there will definitely feel that the time invested in learning how to develop an Android application is comparatively less than what they invest in other technologies. Have the knowledge of Java and scripting languages like Perl, PHP, and the job is done.


By learning Android development in 2021, you open up for many career opportunities such as freelancing, becoming an indie developer, or working for high profile companies like Google, Amazon, Facebook and more. The demand for native Android developers is still very high, and learning Android development has never been easier thanks to increases in online learning materials. Choosing Android App Developer as Career is a good option in 2021, If you want to learn or want to become an Android App Developer than I would like to suggest you DevOpsscool, One of the best option for this course, provide you best learning experience with in-hand practices, Experts are there to solve your query. Don’t wait for the right time to come, Start your learning today.

I Hope this blog is helpful for you and enough knowledge of Android App Developer.

Thank you!!

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Top 15 Methods & built-in tools to troubleshoot windows operating systems

1.Defragmentation and optimize drives

Optimizing your drives can help your PC run smoother and boot up faster. To optimize them:

  1. Select the search bar on the taskbar and enter defrag.
  2. Select Defragment and Optimize Drives.
  3. Select the disk drive you want to optimize.
  4. Select the Optimize button.

2.Disk cleanup

To delete temporary files:

  1. In the search box on the taskbar, type disk cleanup, and select Disk Cleanup from the list of results.
  2. Select the drive you want to clean up, and then select OK.
  3. Under Files to delete, select the file types to get rid of. To get a description of the file type, select it.
  4. Select OK.

If you need to free up more space, you can also delete system files:

  1. In Disk Cleanup, select Clean up system files.
  2. Select the file types to get rid of. To get a description of the file type, select it.
  3. Select OK.

3.Local Security Policy

The local security policy of a system is a set of information about the security of a local computer. The local security policy information includes the following: … Which user accounts may access the system and how. For example, interactively, through a network, or as a service.

4.Recovery drive

A recovery drive stores a copy of your Windows 10 environment on an external source, like a DVD or USB drive. … In most cases you would be out of luck, but not if you’ve already created a recovery drive, which stores a copy of your Windows 10 environment on another source, such as a DVD or USB drive.

5.Registry editor

Registry Editor allows users to perform the following functions: Creating, manipulating, renaming, and deleting registry keys, subkeys, values, and value data. Importing and exporting . … Loading, manipulating, and unloading registry hive format files (Windows NT systems only).

6.Windows defender firewall with advanced security

Windows Defender Firewall with Advanced Security is an important part of a layered security model. By providing host-based, two-way network traffic filtering for a device, Windows Defender Firewall blocks unauthorized network traffic flowing into or out of the local device.

7.Windows memory diagnostic

How to Start Memory Diagnostic Tool in Windows 10

  1. Open Control Panel.
  2. Click on System and Security.
  3. Click on Administrative Tools.
  4. Double-click the “Windows Memory Diagnostic” shortcut.
  5. Click the “Restart now and check for problems” option (The tool also offers an option to schedule a test in the next reboot).

8.System configuration

A system configuration (SC) in systems engineering defines the computers, processes, and devices that compose the system and its boundary. More generally, the system configuration is the specific definition of the elements that define and/or prescribe what a system is composed of.

9.Control panel

 You can use Control Panel to change settings for Windows. These settings control nearly everything about how Windows looks and works.

10.Task Manager 

Task Manager (Windows) … Task Manager, previously known as Windows Task Manager, is a task manager, system monitor, and startup manager included with Microsoft 


HWiNFO is the most comprehensive system summary tool by a long shot. It displays all information about your computer- from the CPU temperatures to fan voltages. In fact, if you are using a Ryzen processor, this should be your go-to choice as alternatives such as CPU-Z have been known to show incorrect readings.

It’s a good tool to have when you want the most accurate readouts of everything related to your computer components.

12.Windows Network Diagnostics Tool

This tool will perform several tests to troubleshoot network connectivity or performance issues. If there are problems with the connection, this tool will try to diagnose the problem and present some possible solutions. It can be used to troubleshoot different network problems such as Internet connectivity, issues connecting to a shared folder, HomeGroup connectivity issues, and even network printer problems. WNDT will automatically run when it detects a problem.

13.Problem Reports and Solutions Tool

This tool will automatically check for problems in Windows related to installations and applications. We can also run this tool manually if we have a particular problem. This tool also enables us to view the problem history. We can also check for new solutions on the Internet. We can always clear solutions and problem history.

14.Services Console

To start or stop the services in real-time, we can use the Services console. The Services console (MMC snap-in) lists detailed information about each service and provides management options. This is the same list as in MSConfig, however, it provides more information and more management options. Keep in mind that services need some type of authentication to be able to start. By default, most services work with a local system account, but we can specify another account to be used when the service wants to start.

15.Windows Diagnostic Infrastructure (WDI)

Starting from Windows 7 we have a Windows Diagnostic Infrastructure (WDI) available. WDI is a set of diagnostic tools that identify existing disk, network, and memory problems. They detect failures and alert us of potential problems. WDI can show us information about existing problems and help us prevent future problems.

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How to clean up your windows operating systems in 2021?

Over time, every Windows installation builds up junk that takes up space and wastes resources. It’s easy to neglect regular maintenance, so often the problem comes from old files and programs.

If you don’t clean your computer, before long you’ll encounter low disk space warnings and notice it slowing down. Let’s walk through how to clean Windows 10 using a variety of tools for different situations.

Step 1: Erase Temporary Junk

Windows 10 includes a pair of similar tools for clearing out old temporary files from your disk, meaning you don’t need a dedicated Windows cleaner app. They’re a great first stop on your Windows 10 cleanup journey.

Disk Cleanup

If you don’t mind an old-school interface, the classic Disk Cleanup tool gets the cleaning job done. Access it by typing Disk Cleanup into the Start menu and selecting the disk you want to clean.

After a moment, you’ll see a list of unnecessary files that Windows can clean up. Assuming you’re an administrator, you should click the Cleanup system files button to scan again for additional types of data.

Feel free to delete pretty much every category of data available here, with a few exceptions. On older versions of Windows 10, watch out for Downloads, which will delete everything in that folder. You may also want to avoid cleaning the Recycle Bin until you’re sure that you don’t need to restore anything from it.

If you’ve recently updated to a new major version of Windows 10, you’ll see a Previous Windows installation(s) entry. Deleting this will remove the old files Windows keeps for 10 days that allows you to easily go back to an earlier version. You should also avoid removing the Windows ESD installation files option, as this is used for resetting your PC via Settings.

Check out Windows folders you can delete to save space for more info on the specific items you can remove with disk Cleanup.

Storage Sense

Windows 10 includes much of this same functionality, with a nicer interface, at Settings > System > Storage. You can use Storage Sense to automatically clean up files when your disk space is low, or every so often. Click Configure Storage Sense or run it now to change these options.

Step 2: Delete Large Files

You’ve removed unnecessary files; the next step to clean up Windows 10 is to find old data taking up a lot of space on your computer. 

Uninstall Big Programs

Under Program Files (and/or Program Files (x86) on 64-bit Windows), you’ll find files for most of the apps you have installed. If you don’t use some of these anymore, head to Settings > Apps > Apps & features to uninstall them.

Step 3: Clean Windows 10 Bloatware

Most store-bought computers come loaded with worthless manufacturer bloatware that wastes space and duplicates functionality already in Windows. In addition, Windows 10 itself includes some junk apps you probably never use.

If you haven’t taken the time to remove bloatware from your system, you should. It’s an important part of Windows 10 cleanup.

Step 4: Tidy Your Desktop

Even after you’ve cleaned up your computer, a messy desktop can still confuse you and make it harder to work efficiently. Many people use their desktop as a temporary storage space, leading to all sorts of files getting scattered across it.

You should try “resetting” your desktop to a clean state to make it neater. Start by moving all the files from your desktop to another location. Next, you can create shortcuts to files you need all the time on your desktop.

If you have so many files that you don’t think this will work, the Fences app is definitely worth a look. It includes powerful tools that let you automatically combine similar desktop icons, hide or show all icons with a few clicks, and much more.

After you’ve cleaned up Windows 10 and your desktop, you’ll feel like you have a whole new machine.

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How to speed up & make faster windows operating system in 2021

Almost nothing is more annoying than a slow Windows 10 computer. Starting up the operating system suddenly takes 5 minutes, starting a game takes a long time, and opening a simple document even takes a lot of time. Do you want to make your Windows 10 PC faster? Then follow the tips in this article. Within a few minutes to an hour, your Windows 10 computer has become a lot faster. In most cases, the changes are completely free.

Disable startup programs:

The first tip to make Windows 10 faster is an important one: disable applications that start automatically when you boot the computer. This is because, by default, countless unnecessary programs startup that uses a lot of memory or processor capacity. This leaves less space for applications that you really want to use. Disabling unnecessary applications is therefore a good start to make Windows 10 faster. Do not be afraid, this is easily achieved within a few clicks.

  1. First press Ctrl-Alt-Del
  2. Click Task Manager
  3. Click on the “Startup” tab
  4. A list of programs that start up by default appears
  5. Pay attention to the “Influence on start-up” row. Is “A lot” here? Then the program logically requires a lot of power from your computer. Do you no longer want this application to start as standard, because you never use the application?
  6. Click on the application with the right mouse button
  7. Select switch off

Pay attention! Do not simply switch off unknown programs. Certain programs can be important for the correct functioning of your computer. Not sure whether the application is an important (driver) program? Then do not switch it off.

Power management settings:

Another tip to make Windows 10 faster is to adjust Power Management. Some Windows 10 devices are standard on energy-saving mode. The laptop or computer uses less power in this mode. This is not entirely surprising at the expense of the speed of your Windows 10 system. Do you want to see if you can make Windows 10 faster by turning this setting off?

  1. Go to the Control Panel
  2. Select System and security
  3. Select ‘Power Management’
  4. Select ‘High performance’

By choosing ‘high performance, the computer will use a little more energy, but it will become a lot faster. Pay attention when using a laptop. If you select “high performance”, your laptop’s battery will maybe not last that long.

Switch off visual effects:

The visual effects of Windows 10 can make your laptop or computer a lot slower. Especially computers with an outdated (or no) graphic card can be slowed down by the visual effects that are switched on as standard. Fortunately, they are easy to turn off by you as a user.

  1. Search for sysdm.cpl via the search function in the Launch Bar to display the System Properties.
  2. Select the “Advanced” tab
  3. Under “Performance”, click Settings 
  4. Select ‘Custom’
  5. Then uncheck the options that you do not want to use.

Do you prefer not to test yourself which visual effects yield the most performance? Then it is also possible to check ‘Best performance’. Of course, selecting this option will make Windows 10 graphically less attractive. However, the performance of Windows 10 will increase considerably.

 Remove unnecessary software:

Both new and old computers with Windows 10 suffer from this problem: unnecessary software that is on the computer. Initially, Microsoft installs software such as test versions of virus scanners and system performance apps. It may seem very useful, but in most cases, this software only reduces the performance of Windows 10. But also all kinds of games or programs that you have deliberately installed come with so-called “bloatware”: software that adds nothing to your user experience.

It’s a shame to keep such software on your computer since Windows 10 only makes it slower. The next tip to make Windows 10 faster is to remove unnecessary programs from your computer.

  1. Search in the Start bar search for “Install and remove programs”.
  2. View the list of applications critically.
  3. Click on programs or games that you will never use again.
  4. Select ‘Delete’.
  5. Verify that you want to delete the app.

By removing these applications, you free up more space on your hard disk and system resources for programs you actually use.

Install an SSD with Windows 10:

Not all of our tips to improve the speed of Windows 10 are software-related. The last tip relates to the hardware of your laptop or computer. Installing an SSD (Solid State Disk) is one of the most effective adjustments you can make. An SSD loads data much faster than an HDD. This means, among other things, that your Windows 10 PC will start up faster and that (heavy) applications will load much faster. Installing an SSD and transferring Windows 10 may sound very difficult, but this can be achieved within an hour. After everything has been transferred correctly, you will soon understand why we recommend anyone who wants to make Windows 10 faster buy an SSD.

Check for malware regularly:

Among the more familiar forms of automated monitoring technologies, malware detection comprises mechanisms to identify and protect against harm from viruses, worms, spyware. Malware detection and prevention technologies are widely available for, server user workstations, and mobile devices, with some tools offering the capability to monitor malware detection software installed on multiple systems or computers.

  1. –>Setting
  2. –>Update&Security
  3. –>Windows Security
  4. –>Virus & threat protection

Defrag Your Hard Disk :

With the built-in disk defragmentation utility in Windows, you can rearrange the files on a disk to occupy contiguous storage space, which will speed up file access.

  1. Hit the Windows Key, type defragment and click “Defragment and Optimize Drives” when you see the option.
  2. Select your system drive (generally C drive) and click Optimize.
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How You Can Earn Money From Home With health

joachimmm created the topic: How You Can Earn Money From Home With health

Health and wellness products means completely different things to families.

Wellness can be defined as ‘the hunt for a normal, well balanced way of living.
Intended for major benefit of this post, well being solutions are increasingly being looked over inside the context
regarding ‘over this counter-top drug treatments, supplements and wellness treatments.

Although for a lot of, well-being items could possibly be known as a great assist in order to recuperation
via illness, intended for other folks it could be a method involving more bettering a number of
aspect of his or her existing health and fitness. The variety of along with makes use of with regard to these kinds of solutions
are generally countless while include the the particular descriptions associated with wellbeing items or maybe wellbeing
packages, based of course after that is advertising these individuals at any time.

No matter what ones reasons for pursuing substitute treatment wellbeing as well as health and wellness
items, one common aim is to achieve optimised health insurance and well-being.

You’ll find strong press images hailing the benefits in addition to security of numerous over the
counter drugs, health supplements as well as health and fitness items, all over the place a person switch
these days. They’ve already both equally solid boasts of being the best miraculous heal
or even solution for just one disorder or perhaps one more. Precisely how correct are generally these claims nevertheless, as well as
do you know the true prices to you inside fiscal as well as health possibility words?

Right after reading this article document, proceed look and perform a fast add-up with the
overall cost of all the health and wellness solutions an individual already have got with investment. I’m
confident the actual figure will certainly astonish anyone just as much while studying ab muscles true as well as
unsafe unwanted effects which may be a result of some medications or nutritional supplements
which are said to be triggering your present condition associated with wellness.

You can even end up being shocked to recognise of which a lot of the ‘over the counter medications an individual
buy on a regular basis, basically take care of the actual signs or symptoms but not the genuine health issue.
Obviously, this process involving working on this sign, side-steps
the feature progressing to the main reason for your problem or perhaps no matter what
it can be which ails a person.

You will be more than likely to help follow a new wellness solution possibly as you have become
cautious with the adverse reactions involving chemically created prescription drugs or because you’re keen in order to
endure ill-health and also improve a selected health condition. Actually it
may very well be that will you need to optimize your present state involving well being.

Although some people might overall wellness goods is usually an useful evaluate towards
improving your wellbeing, you must be aware that long-term using certain otc
medicines and a few health supplements may cause you more harm in comparison with very good, with the long-
phrase benefits much outweighing almost any short-term positive aspects. You could possibly very well know that
that you are having to pay far too higher a cost on such basis as a mere magic pill assure.

Regarding many many years, men and women in lands everywhere purchased healthy do-it-yourself
remedies to regulate his or her medical ailments in addition to wellness requirements, with out manufactured
health and fitness items, that may be damaging for you to wellbeing. They’ve already simply counted
when attaining or maybe maintaining well being by simply crops or simply by additional natural signifies.
It would be suggested of which with the victory of chemical substance and also pharmacological techniques,
many forms of that natural means to overall health possess dropped. In fact, actually
through current requirements, there are several so-called under-developed nations around the world where by
inhabitants’ depend on activities like home made overall wellness solutions,
gained by way of pure types of plant life or perhaps plant-based concentrated amounts.

Though regular treatments depends on clinically guaranteed research to help substantiate
usefulness and also security. Compared, identical can’t be explained regarding some option
medicines as well as health and wellness solutions. There isn’t any this kind of need nevertheless their
campaign because reverence performance usually are regarded as ample within them selves as help
pertaining to beneficial as well as health and fitness claims.

Herbal treatments on the whole usually are undamaging, on the other hand, specific statements becoming created by
a few overall wellness merchandise promoters, (under the actual over the top to be
‘natural’)) can certainly insinuate their health and fitness solutions staying the
exceptional step to your wellbeing condition or wellness inquiries, hence getting you
from wonderful risk. Next, precisely how start are usually these people currently being regarding what’s actually within? Anyone
must always check with your physician around almost any health issues, along with dealing with
along with him/her your own objective or maybe selection of substitute opportinity for remedy using almost any
wellness product or service or perhaps treatment.

Multi-billion-dollar sectors get long weald the electrical power by using
lobbying to realize exemption coming from FDA regulation. It has been recently precisely the
scenario, in line with the Hesitant Inquirer, exactly who, about commenting with
the particular ‘dietary product business last 1994, expresses : “Since next, these kind of
merchandise get bombarded the market, subject matter just to the actual scruples of their

The above mentioned level can be an important that you observe in that, though health and wellness
goods producers may perhaps number materials and also portions used in
specific health and wellness merchandise, there is zero genuine stress about them to help
do so, or maybe to do so correctly. Furthermore, nor features presently there already been any kind of
watchdog physique to ensure these are penalised with this declining.

Thus, do you know the choices accessible to you? Progressively more, many people
tend to be looking at do-it-yourself overall wellness home made herbal solutions.
The distinct change currently being that to produce your individual wellness products,
that you are in the driving a car seat. Not simply have you got an entire awareness of just
what exactly the elements are generally as well as the legitimate amounts, but while using the appropriate higher level of
instruction from the trustworthy practitioner, you might be more conversant using virtually any well being
implications, in the event any.

While using the correct know-how, an individual as well may pull within the old-fashioned but efficient
sources for you to drastically enhance your wellbeing. For example, making use of by natural means well prepared
herbs, vitamin products, vitamins and minerals in addition to supplements, vital herbal oils in addition to floral
essences to generate true recovery remedies that will deal with particular wellness
ailments as an alternative to merely this signs or symptoms.

It truly is inside the awareness of an overall wellness product or service makers to advertise his or her
products being the only option open to you. They don’t want someone to be aware of
the particular ample healthy assets in addition to health-giving efficient qualities of herbal products as well as property
cures which were utilized efficiently regarding many decades. You see, these kinds of
remedies cannot be patented simply because you can create these people on your own and also with a
fraction on the cost.

Whether or not your goal is always to defeat disease, medications intolerance, allergic reaction or just to be able to
optimise your current currently good health, using a little know-how, you could start generating
your own overall wellness products as well as therapies, utilizing only your
easily accessible organic resources in your home and also back garden. Not just would you like to
save your hard earned cash, additionally you alleviate danger associated with considerable or even damaging
preservatives and negative effects .

Do you like mastering more with regards to how one can address a lot of typical ailments without the severe unwanted side effects, applying nothing but healthy herbal treatments, supplements
in addition to nutritional requirements an individual get ready in the home? As an illustration, do you know
positioning yogurt on your own face assist with carry mineral water on the much deeper levels
of your skin color towards surface, moisturizing your skin layer for other morning and camouflaging

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Converting Red Hat Enterprise Linux booting from CLI to GUI

rajeshkumar created the topic: Converting Red Hat Enterprise Linux booting from CLI to GUI

I just found very good links where default Command mode can be converted into GUI mode during system boot.

refer –…ng-to-gui-login.html

Rajesh Kumar
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Ignore existing files or update only newer files with rsync

rajeshkumar created the topic: Ignore existing files or update only newer files with rsync

Ignore existing files or update only newer files with rsynca

Copying from local to remote

Note that all the examples shown in the post are for copying files from the local computer to a remote server/computer.

Default behavoir

The following command will recursively copy all files from the local filesystem from /var/www to the remote system at Note the following:

Any files that do not exist on the remote system are copied over
Any that have been updated will be copied over, although note that rsync is extremely efficient in that only the changed parts of files are copied and if the file is exactly the same if it is not copied over at all
Any that have been deleted on the local system are deleted on the remote
1 rsync -raz –progress /var/www

Ignore existing files

Use the –ignore-existing flag to prevent files from being copied over that already exist on the remote server. By adding this, we eliminate behaviors 2 and 3 in the list above and all that is done is this:

Any files that do not exist on the remote system are copied over
1 rsync –ignore-existing -raz –progress /var/www

Update the remote only if a newer version is on the local filesystem

In the case I was talking about, we didn’t want to overwrite any files at the other end. However you may want to copy files over the have been updated more recently on the local filesystem which is done with the –update flag. The behavior is now like this:

Any files that do not exist on the remote system are copied over
Any files that exist on both local and remote that have a newer timestamp on the local server are copied over. (Conversely, any files that have an older timestamp are not copied over).
1 rsync –update -raz –progress /var/www

Use –dry-run to see what will be copied

It can be a good idea to test what will be transferred before actually doing it to make sure you aren’t going to copy files that you don’t want to. The –dry-run flag helps you do this:
1 rsync –dry-run –update -raz –progress /var/www

Combined with the –progress flag I have included in all the examples, –dry-run will output all the directories it looks at and then all the files that would be copied.

Rajesh Kumar
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Mount: cannot mount block device // read-only

rajeshkumar created the topic: mount: cannot mount block device // read-only


root@rkumar11-usa:~/data/share# sudo mount -t cifs // /home/rkumar11/data/share --verbose -o user=rkumar11
mount: block device // is write-protected, mounting read-only
mount: cannot mount block device // read-only

Solution –

sudo apt-get install cifs-utils

Rajesh Kumar
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