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MongoDB MCQs

Which of the following statement are true

The _id of a document need only be unique on the shard in which the document is housed

If you do not specify and _id when doing an insert, the driver will create one for you

You must specify and _id when inserting documents

By default, there is no index on _id. It is best practice to add one if you expect to query based on _id.

Answer

Correct Answer: If you do not specify and _id when doing an insert, the driver will create one for you

Explanation:

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