Q. Which of the following stages cannot appear multiple times in a pipeline?

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Q. Point out the correct statement.

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Q. Aggregation expressions use ______ path to access fields in the input documents.

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Q. Which of the following statement is equivalent to “$$CURRENT.<field>”?

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Q. Point out the wrong statement.

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Q. ______ binds variables for use in the specified expression.

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Q. ________ applies an expression to each item in an array and returns an array with the applied results.

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Q. In the vars assignment block, ________ refers to the value of an externally defined variable low.

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Q. To avoid treating numeric or boolean literals as projection flags, use the _______ expression to wrap the numeric or boolean literals.

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Q. MongoDB treats the literals as projection flags, valid only in the _______ stage.

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Q. ______ expressions ignores the duplicate entries in each input array and the order of the elements.

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Q. Point out the correct statement.

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Q. ________ returns true if the input sets have the same distinct elements.

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Q. Which of the following accepts any number of argument expression?

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Q. Point out the wrong statement.

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Q. ________ returns a set with elements that appear in any of the input sets.

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Q. Which of the following performs a relative complement of the second set relative to the first?

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Q. $setIsSubset returns _______ if all elements of the first set appear in the second set, including when the first set equals the second set.

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Q. _______ accepts only single argument expression.

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Q. $allElementsTrue returns true if no element of a set evaluates to ____________

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