Question

An arbiter will always be an arbiter whereas a primary may step down and become a secondary and a _________ may become the primary during an election.

(a) center

(b) secondary

(c) primary

(d) none of the mentioned

This question was addressed to me in an online interview.

I would like to ask this question from Replication in MongoDB topic in division Replication Concepts, Processes and Replication Set of MongoDB

Answer 1

Correct choice is (b) secondary

To explain: If your replica set has an even number of members, add an arbiter to obtain a majority of votes in an election for primary.