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A _______ set is a group of mongod instances that host the same data set.

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A _______ set is a group of mongod instances that host the same data set.

(a) copy

(b) sorted

(c) radii

(d) replica

I have been asked this question in an international level competition.

The origin of the question is Replication in MongoDB in chapter Replication Concepts, Processes and Replication Set of MongoDB

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Best answer
Correct answer is (d) replica

The explanation: One mongod, the primary, receives all write operations.

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