Database / Apache Cassandra Interview Questions

What is CQL?

CQL query language is a NoSQL interface that is intentionally similar to SQL, providing users who are comfortable with relational databases a familiar language that ultimately lowers the barrier of entry to Apache Cassandra.

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What is Apache Cassandra? Key features of Cassandra. Compare Cassandra Vs Relational Databases. How does Cassandra store data? What are SSTables in Cassandra? What is CommitLog in Cassandra? What are Memtables in Cassandra? What is the NoSQL database? Advantages of NoSQL Databases. What is CQL? What are the main components of Cassandra? What is a Node in Cassandra? What is the Data Center and Cluster in Cassandra? What is meant by Cassandra rack? Difference between Memtable and SSTable. Explain the concept of Bloom Filter in Cassandra. What is Cqlsh in Cassandra? What is source command in Cassandra? What is the purpose of using thrift in Cassandra? What is replication factor in Cassandra? Explain Cassandra Data Model. What is Super Column in Cassandra? does cassandra have joins? What are keyspaces in Cassandra? What are cassandra collections? What does "frozen" mean in Cassandra? Which operations are not allowed on frozen collections in Cassandra?

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