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Question 8: Which of the following is, A Cassandra table-specific, in-memory data structure that resembles a write-back cache.

  1. Commit log
  2. Memtable
  3. SSTable
  4. Redo log

Correct Answer: 2

Explanation: A sequentially written commit log on each node captures write activity to ensure data durability. Data is then indexed and written to an in-memory structure, called a memtable, memtable which resembles a write-back cache.