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_______ result encompasses instances of undefined values or missing fields.

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_______ result encompasses instances of undefined values or missing fields.

(a) Number

(b) String

(c) Null

(d) None of the mentioned

I have been asked this question in unit test.

This intriguing question originated from Pipeline Operators topic in section Aggregation Concepts and Aggregation Mechanics of MongoDB

1 Answer

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Best answer
The correct answer is (c) Null

Best explanation: Null value does not imply zero.

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