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Read preference modes are also available to clients connecting to a sharded cluster through ______________

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Read preference modes are also available to clients connecting to a sharded cluster through ______________

(a) MMS

(b) mongos

(c) mongod

(d) none of the mentioned

This question was posed to me in exam.

The above asked question is from Operational Segregation in section Monitoring MongoDB and Optimization Strategies for MongoDB of MongoDB

1 Answer

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Best answer
The correct answer is (b) mongos

The best explanation: The mongos instance obeys specified read preferences when connecting to the replica set that provides each shard in the cluster.

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