{"id":10301,"date":"2023-05-02T11:46:27","date_gmt":"2023-05-02T11:46:27","guid":{"rendered":"https:\/\/www.scmgalaxy.com\/tutorials\/?p=10301"},"modified":"2023-06-19T13:29:42","modified_gmt":"2023-06-19T13:29:42","slug":"top-50-cassandra-interview-questions-with-answers","status":"publish","type":"post","link":"https:\/\/www.scmgalaxy.com\/tutorials\/top-50-cassandra-interview-questions-with-answers\/","title":{"rendered":"Top 50 Cassandra Interview Questions with Answers"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.scmgalaxy.com\/tutorials\/wp-content\/uploads\/2023\/05\/image-61.png\" alt=\"\" class=\"wp-image-10302\" width=\"679\" height=\"382\" srcset=\"https:\/\/www.scmgalaxy.com\/tutorials\/wp-content\/uploads\/2023\/05\/image-61.png 654w, https:\/\/www.scmgalaxy.com\/tutorials\/wp-content\/uploads\/2023\/05\/image-61-300x169.png 300w\" sizes=\"auto, (max-width: 679px) 100vw, 679px\" \/><figcaption class=\"wp-element-caption\"><strong><em>Cassandra Interview Questions with Answers<\/em><\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">1) What is Apache Cassandra?<br>a) A NoSQL database management system<br>b) A relational database management system<br>c) A file storage system<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A NoSQL database management system<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">2) Which language is Cassandra written in?<br>a) Java<br>b) Python<br>c) C++<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) Java<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">3) Which partitioning mechanism does Cassandra use?<br>a) Hash partitioning<br>b) Range partitioning<br>c) List partitioning<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) Hash partitioning<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">4) Which consistency levels are provided by Cassandra?<br>a) Weak, Strong, and Absolute<br>b) One, Two, and Three<br>c) Consistency level can be customized<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: c) Consistency level can be customized<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">5) What is a node in Cassandra?<br>a) A server<br>b) A column<br>c) A row<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A server<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">6) What is a keyspace in Cassandra?<br>a) A table<br>b) A group of related tables<br>c) A database<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: c) A database<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">7) What is a column family in Cassandra?<br>a) A column<br>b) A row<br>c) A group of related columns<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: c) A group of related columns<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">8) What is a column in Cassandra?<br>a) A row<br>b) A piece of data<br>c) A table<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: b) A piece of data<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">9) Which storage engine is used by Cassandra?<br>a) InnoDB<br>b) MyISAM<br>c) SSTable<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: c) SSTable<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">10) What is the default consistency level in Cassandra?<br>a) ONE<br>b) TWO<br>c) QUORUM<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) ONE<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">11) What is the purpose of a replica in Cassandra?<br>a) To increase write throughput<br>b) To increase read throughput<br>c) To provide fault tolerance<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: c) To provide fault tolerance<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">12) What is a seed node in Cassandra?<br>a) A node that joins the cluster first<br>b) A node used for database backups<br>c) A node used for load balancing<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A node that joins the cluster first<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">13) What is CQL?<br>a) Cassandra Query Language<br>b) Consistency Query Language<br>c) Column Query Language<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) Cassandra Query Language<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">14) What is a token in Cassandra?<br>a) A form of authentication<br>b) A unique identifier for a partition<br>c) A type of data in a column family<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: b) A unique identifier for a partition<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">15) What is a write ahead log in Cassandra?<br>a) A log of all database changes<br>b) A type of column family<br>c) A type of index<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A log of all database changes<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">16) Which command is used to create a keyspace in Cassandra?<br>a) CREATE KEYSPACE<br>b) CREATE DATABASE<br>c) CREATE TABLESPACE<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) CREATE KEYSPACE<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">17) Which command is used to create a table in Cassandra?<br>a) CREATE TABLE<br>b) CREATE COLUMN FAMILY<br>c) CREATE SCHEMA<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) CREATE TABLE<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">18) What is compaction in Cassandra?<br>a) The process of compressing data<br>b) The process of merging and removing old data<br>c) The process of optimizing queries<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: b) The process of merging and removing old data<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">19) What is a Bloom filter in Cassandra?<br>a) A data structure used for probabilistic querying<br>b) A type of column family<br>c) A type of index<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A data structure used for probabilistic querying<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">20) What is a hint in Cassandra?<br>a) A suggestion for query optimization<br>b) A way to provide fault tolerance during database writes<br>c) A type of index<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: b) A way to provide fault tolerance during database writes<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">21) Which command is used to insert data into a table in Cassandra?<br>a) INSERT INTO<br>b) UPDATE<br>c) UPSERT<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) INSERT INTO<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">22) Which command is used to delete data from a table in Cassandra?<br>a) DELETE FROM<br>b) REMOVE<br>c) ERASE<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) DELETE FROM<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">23) What is tombstoning in Cassandra?<br>a) A method of marking deleted data<br>b) A type of compaction<br>c) A type of optimization<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A method of marking deleted data<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">24) What is the purpose of a secondary index in Cassandra?<br>a) To optimize read queries<br>b) To optimize write queries<br>c) To provide fault tolerance<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) To optimize read queries<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">25) Which command is used to create a secondary index in Cassandra?<br>a) CREATE INDEX<br>b) ADD INDEX<br>c) BUILD INDEX<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) CREATE INDEX<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">26) Which command is used to drop a table in Cassandra?<br>a) DROP TABLE<br>b) REMOVE TABLE<br>c) ERASE TABLE<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) DROP TABLE<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">27) Which command is used to truncate a table in Cassandra?<br>a) TRUNCATE TABLE<br>b) CLEAR TABLE<br>c) ERASE TABLE<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) TRUNCATE TABLE<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">28) Which command is used to change the replication factor of a keyspace in Cassandra?<br>a) ALTER KEYSPACE<br>b) MODIFY KEYSAPCE<br>c) UPDATE KEYSPACE<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) ALTER KEYSPACE<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">29) What is data modeling in Cassandra?<br>a) The process of designing a database schema<br>b) The process of optimizing database queries<br>c) The process of compressing data<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) The process of designing a database schema<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">30) Which command is used to create a user-defined type?<br>a) CREATE TYPE<br>b) ADD TYPE<br>c) BUILD TYPE<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) CREATE TYPE<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">31) What is materialized view in Cassandra?<br>a) A type of index<br>b) A secondary table that stores pre-aggregated data<br>c) A type of compression<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: b) A secondary table that stores pre-aggregated data<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">32) Which command is used to create a materialized view in Cassandra?<br>a) CREATE MATERIALIZED VIEW<br>b) ADD MATERIALIZED VIEW<br>c) BUILD MATERIALIZED VIEW<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) CREATE MATERIALIZED VIEW<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">33) What is a batch statement in Cassandra?<br>a) A way to group multiple queries together<br>b) A way to optimize queries<br>c) A way to serialize data<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A way to group multiple queries together<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">34) Which command is used to execute a batch statement in Cassandra?<br>a) BATCH<br>b) EXECUTE BATCH<br>c) BEGIN BATCH<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: c) BEGIN BATCH<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">35) What is a UDF in Cassandra?<br>a) A user-defined function<br>b) A type of index<br>c) A type of data type<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A user-defined function<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">36) Which command is used to create a user-defined function in Cassandra?<br>a) CREATE FUNCTION<br>b) ADD FUNCTION<br>c) BUILD FUNCTION<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) CREATE FUNCTION<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">37) What is virtual node in Cassandra?<br>a) A method of partitioning data<br>b) A method of replicating data<br>c) A type of index<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A method of partitioning data<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">38) What is a counter column in Cassandra?<br>a) A column that stores counts<br>b) A column that stores binary data<br>c) A column that stores timestamps<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A column that stores counts<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">39) Which data model does Cassandra follow?<br>a) Object-relational data model<br>b) Document data model<br>c) Key-value data model<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: c) Key-value data model<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">40) What is the purpose of a batchlog in Cassandra?<br>a) To store failed batch operations<br>b) To store successful batch operations<br>c) To provide fault tolerance during batch operations<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) To store failed batch operations<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">41) Which command is used to view the schema in Cassandra?<br>a) DESCRIBE<br>b) SHOW<br>c) LIST<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) DESCRIBE<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">42) What is a range tombstone in Cassandra?<br>a) A type of column family<br>b) A type of index<br>c) A type of deleted data marker<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: c) A type of deleted data marker<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">43) What is a lightweight transaction in Cassandra?<br>a) A type of compaction process<br>b) A type of database backup<br>c) A way to ensure data consistency during database writes<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: c) A way to ensure data consistency during database writes<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">44) Which command is used to insert data with a lightweight transaction in Cassandra?<br>a) IF EXISTS INSERT<br>b) IF NOT EXISTS INSERT<br>c) IF DOES NOT EXIST INSERT<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: b) IF NOT EXISTS INSERT<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">45) What is a commit log in Cassandra?<br>a) A log of all database changes<br>b) A type of index<br>c) A type of replication factor<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A log of all database changes<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">46) Which command is used to change the replication strategy of a keyspace in Cassandra?<br>a) ALTER KEYSPACE<br>b) MODIFY KEYSPACE<br>c) UPDATE KEYSPACE<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) ALTER KEYSPACE<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">47) What is a virtual data center in Cassandra?<br>a) A method of organizing nodes into logical groups<br>b) A type of virtual machine<br>c) A type of data center simulator<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A method of organizing nodes into logical groups<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">48) Which command is used to change the replication factor of a table in Cassandra?<br>a) ALTER TABLE<br>b) MODIFY TABLE<br>c) UPDATE TABLE<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) ALTER TABLE<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">49) What is a token range in Cassandra?<br>a) A range of tokens assigned to nodes<br>b) A range of data in a table<br>c) A range of metadata for a keyspace<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: a) A range of tokens assigned to nodes<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">50) Which command is used to compact a table in Cassandra?<br>a) COMPACT TABLE<br>b) OPTIMIZE TABLE<br>c) REPAIR TABLE<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Answer: c) REPAIR TABLE<\/h4>\n","protected":false},"excerpt":{"rendered":"<p>1) What is Apache Cassandra?a) A NoSQL database management systemb) A relational database management systemc) A file storage system Answer: [&hellip;]<\/p>\n","protected":false},"author":33,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[1],"tags":[],"class_list":["post-10301","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Top 50 Cassandra Interview Questions with Answers - scmGalaxy<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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