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The index on the shard key cannot be a _________ index.

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The index on the shard key cannot be a _________ index.

(a) single

(b) multkikey

(c) unique

(d) all of the mentioned

The question was posed to me in examination.

The origin of the question is Sharded Cluster Behavior in division Sharding Concepts, Mechanics and Sharded Cluster of MongoDB

1 Answer

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Best answer
The correct choice is (b) multkikey

To elaborate: Shard keys are immutable and cannot be changed after insertion.

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