Question

A shard key that increases monotonically will not hinder performance if most of your write operations are ____ operations.

(a) insert()

(b) update()

(c) delete()

(d) all of the mentioned

I got this question in a national level competition.

This question is from Sharded Cluster Behavior topic in section Sharding Concepts, Mechanics and Sharded Cluster of MongoDB

Answer 1

Correct choice is (b) update()

Best explanation: Generally, choose shard keys that have both high cardinality and will distribute write operations across the entire cluster.