Question

Point out the correct statement.

(a) A rollback does not occur if the write operations replicate to another member of the replica set before the primary steps down

(b) Secondaries that can not keep up with the throughput of operations on the former primary, decrease the size and impact of the rollback

(c) Fault tolerance is an effect of replica set size, but the relationship is not direct

(d) None of the mentioned

The question was posed to me in an internship interview.

My question is from Replica Set High Availability in portion Replication Concepts, Processes and Replication Set of MongoDB

Answer 1

Correct option is (a) A rollback does not occur if the write operations replicate to another member of the replica set before the primary steps down

The explanation is: When a rollback does occur, administrators must decide whether to apply or ignore the rollback data.