A. A relational database
B. A NoSQL database
C. A key-value store
D. A file storage system
Answer: B. A NoSQL database
A. Apache Software Foundation
Answer: C. Facebook
A. ACID transactions
B. Complex joins
C. High write throughput
D. In-memory processing
Answer: C. High write throughput
B. CQL (Cassandra Query Language)
Answer: B. CQL (Cassandra Query Language)
A. A collection of related tables
B. A group of connected nodes
C. A data center
D. A schema in Cassandra
Answer: B. A group of connected nodes
Answer: D. Column-family
Answer: A. ONE
C. Commit Log
Answer: B. Shard
A. A storage engine
B. A secondary index
C. An in-memory table
D. An immutable on-disk data file
Answer: D. An immutable on-disk data file
Answer: B. QUORUM
Answer: C. nodetool
Answer: A. Column-family
A. To improve write performance
B. To improve read performance
C. To reclaim disk space
D. To manage data distribution
Answer: C. To reclaim disk space
A. The number of columns in a table
B. The number of nodes in the cluster
C. The number of data centers
D. The number of copies of data across nodes
Answer: D. The number of copies of data across nodes
Answer: A. timestamp
A. A key made up of multiple columns
B. A primary key with only one column
C. A key for indexing data
D. A hidden key used for internal operations
Answer: A. A key made up of multiple columns
18. Which consistency level ensures that data is consistent across all replicas before a read is returned?
Answer: D. ALL
A. A tool for repairing data
B. A network security feature
C. A gossip protocol
D. A component for determining node locations and network topology
Answer: D. A component for determining node locations and network topology
Answer: D. RangeCompactionStrategy
21. Which consistency level in Cassandra ensures that at least one replica has acknowledged a write operation?
Answer: A. ONE
A. To exchange cluster state information
B. To compress data
C. To create secondary indexes
D. To perform read operations
Answer: A. To exchange cluster state information
Answer: D. KeyTieredCompactionStrategy
A. To record schema changes
B. To maintain data consistency
C. To log write operations
D. To create secondary indexes
Answer: C. To log write operations
Answer: B. NetworkTopologyStrategy
A. Cassandra supports complex joins like SQL databases.
B. Cassandra does not support joins.
C. Cassandra supports joins only in CQL.
D. Cassandra supports joins using the JOIN keyword.
Answer: B. Cassandra does not support joins.
A. To repair hardware failures
B. To repair data inconsistencies between nodes
C. To repair query performance issues
D. To repair the commit log
Answer: B. To repair data inconsistencies between nodes
A. You should create a table for each query you want to perform.
B. Denormalization is discouraged in Cassandra.
C. Complex relationships between data can be easily represented.
D. Cassandra supports a fixed schema.
Answer: A. You should create a table for each query you want to perform.
A. Enables compression for SSTables.
B. Compacts the commit log.
C. Enables read repair.
D. Reduces the storage overhead for wide rows.
Answer: D. Reduces the storage overhead for wide rows.
A. Counting the number of nodes in a cluster.
B. Counting the number of rows in a table.
C. Counting the number of columns in a table.
D. Counting events or occurrences.
Answer: D. Count events or occurrences.