1. What is Logstash?
A) It is an open-source data processing tool
B) It is an automated testing tool
C) It is a database management system
D) It is a data visualization tool
Answer: A)
2. Which programming language is used to write Logstash plugins?
A) Java
B) Python
C) Ruby
D) All of the above
Answer: C)
3. What is the purpose of Logstash grok filter?
A) To convert logs into JSON format
B) To parse unstructured log data
C) To compress log data
D) To encrypt log data
Answer: B)
4. Which of the following is NOT a Logstash filter plugin?
A) Grok
B) Mutate
C) Date
D) Java
Answer: D)
5. Which output plugin should be used to store logs in Elasticsearch?
A) Filebeat
B) Kafka
C) Redis
D) Elasticsearch
Answer: D)
6. How can you add the timestamp to log messages in Logstash?
A) By using the Date filter plugin
B) By using the Elasticsearch output plugin
C) By using the File input plugin
D) By using the Grok filter plugin
Answer: A)
7. What is the purpose of the Logstash split filter?
A) To split log messages into multiple sections
B) To split unstructured data into fields
C) To split data into different output streams
D) To split data across multiple Logstash instances
Answer: A)
8. Which plugin would you use to remove fields from a log message?
A) Grok
B) Mutate
C) Date
D) Elasticsearch
Answer: B)
9. What is the purpose of the Logstash aggregate filter?
A) To summarize log data into a single message
B) To aggregate logs from multiple sources
C) To filter out unwanted data from logs
D) None of the above
Answer: A)
10. How can you ensure that Logstash processes messages in order?
A) By using the input plugin
B) By using the output plugin
C) By using the filter plugin
D) By using the codec plugin
Answer: C)
11. Which plugin would you use to convert a log message into JSON format?
A) Grok
B) Json
C) Date
D) Elasticsearch
Answer: B)
12. What is the purpose of the multiline filter in Logstash?
A) To combine multiple log messages into a single event
B) To split log messages into multiple events
C) To convert log data to a JSON format
D) To remove unwanted fields from log messages
Answer: A)
13. Which plugin should be used to ingest data from a CSV file?
A) Csv
B) File
C) Json
D) Grok
Answer: A)
14. What is the purpose of the Logstash fingerprint filter?
A) To compress log data
B) To generate unique identifiers for log messages
C) To tokenize log data
D) To extract fields from log messages
Answer: B)
15. Which codec should be used to read syslog messages?
A) Json
B) Syslog
C) Plain
D) None of the above
Answer: B)
16. How can you add a prefix to log messages in Logstash?
A) By using the mutate filter plugin
B) By using the date filter plugin
C) By using the File input plugin
D) By using the Elasticsearch output plugin
Answer: A)
17. What is the purpose of the Logstash translate filter?
A) To translate log messages into different languages
B) To convert log data into CSV format
C) To convert timestamps to a specified format
D) To replace values in log messages
Answer: D)
18. Which plugin would you use to convert a log message to uppercase?
A) Json
B) Uppercase
C) Grok
D) Mutate
Answer: D)
19. What is the purpose of the kv filter in Logstash?
A) To convert log messages into key-value pairs
B) To aggregate log data from multiple sources
C) To split log messages into multiple events
D) None of the above
Answer: A)
20. Which codec should be used to read JSON data?
A) Json_lines
B) Plain
C) Csv
D) Syslog
Answer: A)
21. What is the purpose of the Logstash throttle filter?
A) To control the rate at which log messages are processed
B) To aggregate log data from multiple sources
C) To split log messages into multiple events
D) None of the above
Answer: A)
22. Which plugin would you use to add a new field to a log message?
A) Mutate
B) Date
C) Json
D) Syslog
Answer: A)
23. What is the purpose of the Logstash uri_parser filter?
A) To parse URIs in log messages
B) To split log messages into multiple events
C) To convert timestamps to a specified format
D) None of the above
Answer: A)
24. Which plugin should be used to ingest data from Kafka?
A) Kafka
B) File
C) Csv
D) Grok
Answer: A)
25. What is the purpose of the Logstash syslog_pri filter?
A) To parse syslog messages
B) To split log messages into multiple events
C) To convert timestamps to a specified format
D) None of the above
Answer: A)
26. Which codec should be used to read Avro data?
A) Avro
B) Csv
C) Syslog
D) Plain
Answer: A)
27. What is the purpose of the Logstash bytes filter?
A) To convert log data to bytes format
B) To split log messages into multiple events
C) To convert timestamps to a specified format
D) To limit the size of log messages
Answer: D)
28. Which plugin would you use to add a tag to a log message?
A) Json
B) Mutate
C) Grok
D) Csv
Answer: B)
29. What is the purpose of the Logstash drop filter?
A) To drop log messages that match a specified condition
B) To aggregate log data from multiple sources
C) To split log messages into multiple events
D) None of the above
Answer: A)
30. Which plugin should be used to ingest data from a SQL database?
A) Jdbc
B) File
C) Csv
D) Grok
Answer: A)
31. What is the purpose of the Logstash dns filter?
A) To resolve IP addresses to hostnames in log messages
B) To split log messages into multiple events
C) To convert timestamps to a specified format
D) None of the above
Answer: A)
32. Which codec should be used to read XML data?
A) Xml
B) Csv
C) Json
D) Syslog
Answer: A)
33. What is the purpose of the Logstash prune filter?
A) To remove fields from log messages that match a specified condition
B) To split log messages into multiple events
C) To convert timestamps to a specified format
D) None of the above
Answer: A)
34. Which plugin would you use to perform a DNS lookup in Logstash?
A) Json
B) Dns
C) Csv
D) Grok
Answer: B)
35. What is the purpose of the Logstash uuid filter?
A) To generate a unique identifier for each log message
B) To split log messages into multiple events
C) To convert timestamps to a specified format
D) None of the above
Answer: A)
36. Which codec should be used to read YAML data?
A) YAML
B) Json
C) Syslog
D) Csv
Answer: A)
37. What is the purpose of the Logstash geoip filter?
A) To add geo-location information to log messages
B) To split log messages into multiple events
C) To convert timestamps to a specified format
D) None of the above
Answer: A)
38. Which plugin should be used to ingest data from a MongoDB database?
A) Mongo
B) File
C) Csv
D) Grok
Answer: A)
39. What is the purpose of the Logstash throttle_retry filter?
A) To retry log messages when a specified condition is met
B) To aggregate log data from multiple sources
C) To split log messages into multiple events
D) None of the above
Answer: A)
40. Which codec should be used to read JSON logs with multiple lines?
A) Json_lines
B) Json
C) Csv
D) Plain
Answer: A)
41. What is the purpose of the Logstash clone filter?
A) To create a copy of a log message
B) To split log messages into multiple events
C) To convert timestamps to a specified format
D) None of the above
Answer: A)
42. Which plugin would you use to remove leading and trailing white spaces from a log message?
A) Grok
B) Strip
C) Csv
D) Json
Answer: B)
43. What is the purpose of the Logstash mutate_replace filter?
A) To replace field values in log messages
B) To aggregate log data from multiple sources
C) To split log messages into multiple events
D) None of the above
Answer: A)
44. Which codec should be used to read Apache Avro logs?
A) Avro
B) Csv
C) Json
D) Plain
Answer: A)
45. What is the purpose of the Logstash cidr filter?
A) To match IP addresses in log messages against a CIDR block
B) To split log messages into multiple events
C) To convert timestamps to a specified format
D) None of the above
Answer: A)
46. Which plugin would you use to rename a field in a log message?
A) Mutate_rename
B) Grok
C) Csv
D) Json
Answer: A)
47. What is the purpose of the Logstash xml filter?
A) To parse XML data from log messages
B) To split log messages into multiple events
C) To convert timestamps to a specified format
D) None of the above
Answer: A)
48. Which codec should be used to read Apache Kafka logs?
A) Kafka
B) Json
C) Csv
D) Syslog
Answer: A)
49. What is the purpose of the prune_metadata filter in Logstash?
A) To remove metadata fields from log messages
B) To aggregate log data from multiple sources
C) To split log messages into multiple events
D) None of the above
Answer: A)
50. Which plugin should be used to ingest data from a Couchbase database?
A) Couchbase
B) File
C) Csv
D) Grok
Answer: A)
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