___________ returns either the non-null result of the first expression – McqOptions

MCQOPTIONS

1.	___________ returns either the non-null result of the first expression.
A.	$Null
B.	$ifNull
C.	$ElseNull
D.	None of the mentioned
Answer» C. $ElseNull

Discussion

No Comment Found

Related MCQs

Which of the following operation can be optionally used for map reduce?
Pipeline stages can use __________ for tasks such as calculating the average or concatenating a string.
_____ Writes the resulting documents of the aggregation pipeline to a collection.
Which of the following operator is related to geography of data ?
In the vars assignment block, ________ refers to the value of an externally defined variable low .
MongoDB treats the literals as projection flags, valid only in the _______ stage.
To avoid treating numeric or boolean literals as projection flags, use the _______ expression to wrap the numeric or boolean literals.
_______ accepts only single argument expression.
Which of the following method is overrided by Index filters ?
Query shape consists of a combination of query, sort, and _________ specifications.