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The $rename operator logically performs a _______ of both the old name and the new name.

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The $rename operator logically performs a _______ of both the old name and the new name.

(a) $unset

(b) $set

(c) $Nested

(d) None of the mentioned

This question was posed to me in an international level competition.

The query is from MongoDB documents in division GridFS, BSON Datatype and Administration Concepts of MongoDB

1 Answer

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Best answer
Correct option is (a) $unset

Best explanation: If the field to rename does not exist in a document, $rename does nothing.

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