Cassandra Practice Test

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Prepare efficiently for the Cassandra Test. Study with comprehensive quizzes and real-world scenarios. Test your understanding with multiple-choice questions and detailed explanations. Get ready for a successful exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What does the key cache store?

Byte offsets of the most recently accessed records
The latest entries of the MemTable
Complete snapshots of data
All write requests

The correct answer is: Byte offsets of the most recently accessed records

The key cache in Cassandra is specifically designed to store the byte offsets of the most recently accessed partition keys. This allows for quicker retrieval of those data partitions by reducing the amount of time taken to seek through the underlying storage system. By keeping track of these offsets, Cassandra can quickly access data that has been frequently queried, significantly enhancing read performance. The other choices do not accurately describe the function of the key cache. The latest entries of the MemTable pertain more to what is stored in memory prior to being written to disk, while complete snapshots of data would relate more to backup processes rather than caching techniques. The storage of all write requests does not align with the caching mechanism's primary objective, which is to optimize read operations through efficient data retrieval rather than to store all transactional data.