Question

Point out the correct statement.

(a) MongoDB distributes data, or shards, at the collection level

(b) To shard a document, you need to select a shard key

(c) MongoDB divides the shard key values into replica sets

(d) All of the mentioned

I have been asked this question in final exam.

This interesting question is from Sharding Concepts topic in portion Sharding Concepts, Mechanics and Sharded Cluster of MongoDB

Answer 1

Right answer is (a) MongoDB distributes data, or shards, at the collection level

Easiest explanation: Sharding partitions a collection’s data by the shard key.