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Secondary members replicate _________ operations from the primary.

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Secondary members replicate _________ operations from the primary.

(a) Update

(b) Drop

(c) Insert

(d) None of the mentioned

This question was addressed to me during an interview for a job.

Asked question is from Data from Collections topic in portion Monitoring MongoDB and Optimization Strategies for MongoDB of MongoDB

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The correct answer is (d) None of the mentioned

Explanation: On replica sets, the TTL background thread only deletes documents on the primary.

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