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Changing the _______ option will change the port that mongod listens for incoming connections on.

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Changing the _______ option will change the port that mongod listens for incoming connections on.

(a) –shardsrvkey

(b) –shardsrv

(c) –shard

(d) All of the mentioned

This question was addressed to me during a job interview.

This intriguing question comes from Cluster Deployment topic in chapter Sharding Concepts, Mechanics and Sharded Cluster of MongoDB

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Correct answer is (b) –shardsrv

To elaborate: The single-shard cluster is now a non-sharded replica set that will accept read and write operations on the data set.

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