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Point out the correct statement.

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Point out the correct statement.

(a) Read operations on sharded clusters are most efficient when directed to a specific shard

(b) Sharded clusters allow you to partition a data set among a cluster of mongod instances in a way that is nearly transparent to the application

(c) For a sharded cluster, applications issue operations to one of the mongos instances associated with the cluster

(d) All of the mentioned

The question was asked by my college professor while I was bunking the class.

My question comes from Write operations topic in portion MongoDB CRUD Concepts and Operation of MongoDB

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The correct choice is (d) All of the mentioned

The best I can explain: Queries to sharded collections should include the collection’s shard key.

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