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_id is a ________ bytes hexadecimal number which assures the uniqueness of every document.

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_id is a ________ bytes hexadecimal number which assures the uniqueness of every document.

(a) 13

(b) 16

(c) 12

(d) 10

The question was asked during an interview.

The query is from Generate Test Data in section MongoDB CRUD Concepts and Operation of MongoDB

1 Answer

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Best answer
Correct choice is (c) 12

The best explanation: You can provide _id while inserting the document.

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