Question

Which of the following is syntax for calculating minimum value?

(a) { $minimum: <int> }

(b) { $min: <expression>}

(c) { $minimum: <expression> }

(d) None of the mentioned

The question was asked by my college director while I was bunking the class.

Asked question is from Pipeline Operators topic in chapter Aggregation Concepts and Aggregation Mechanics of MongoDB

Answer 1

The correct answer is (b) { $min: <expression>}

Easiest explanation: $min returns the lowest value that results from applying an expression to each document in a group of documents that share the same group by key.