Question 12: Map the followings

1. Commit log
2. SSTable
3. CQL Table

1. Consists of columns and has a primary key
2. All data is written first to this for durability.
3. Maintained for each Cassandra table

1. A-1 B-2  C-3
2. A-3 B-2  C-1
3. A-1 B-3  C-2
4. A-2 B-3  C-1

Correct Answer: 4

Explanation:

Commit log: All data is written first to the commit log for durability. After all its data has been flushed to SSTables, it can be archived, deleted, or recycled.

SSTable: A sorted string table (SSTable) is an immutable data file to which Cassandra writes memtables periodically. SSTables are append only and stored on disk sequentially and maintained for each Cassandra table.

CQL Table: A collection of ordered columns fetched by table row. A table consists of columns and has a primary key.