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To support replication, the primary records all changes to its data sets in its _______

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To support replication, the primary records all changes to its data sets in its _______

(a) oplog

(b) adlog

(c) log

(d) none of the mentioned

I have been asked this question in an interview for internship.

My question is based upon Replication in MongoDB topic in chapter Replication Concepts, Processes and Replication Set of MongoDB

1 Answer

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Best answer
Right choice is (a) oplog

Explanation: If the primary is unavailable, the replica set will elect a secondary to be primary.

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