gs gs112 Aggregation Concepts and Aggregation Mechanics - Pipeline Optimization - Quiz No.1
gs gs112 MongoDB Quiz
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Question 1: ______ expressions ignores the duplicate entries in each input array and the order of the elements.
set
boolean
aggregate
none of the mentioned
Question 2: Point out the correct statement.
To avoid parsing ambiguity if the argument is a literal array, you must wrap the literal array in a $lits expression or keep the outer array that designates the argument list
Expressions cannot include field paths and system variables, literals, expression objects, and expression operators
Operator expressions are similar to functions that take arguments
All of the mentioned
Question 3: ________ returns true if the input sets have the same distinct elements.
$setUnion
$setDifference
$setEquals
None of the mentioned
Question 4: Which of the following accepts any number of argument expression?
$setIntersection
$setDifference
$setEquals
None of the mentioned
Question 5: Point out the wrong statement.
Boolean expressions evaluate their argument expressions as booleans and return a boolean as the result
In addition to the false boolean value, Boolean expression evaluates as false the following: null, 0, and undefined values
Set expressions performs set operation on arrays, treating arrays as sets
None of the mentioned
Question 6: ________ returns a set with elements that appear in any of the input sets.
$setIntersection
$setDifference
$setEquals
$setUnion
Question 7: Which of the following performs a relative complement of the second set relative to the first?
$setIntersection
$setDifference
$setEquals
$setUnion
Question 8: $setIsSubset returns _______ if all elements of the first set appear in the second set, including when the first set equals the second set.
Null
True
False
None of the mentioned
Question 9: _______ accepts only single argument expression.
$setIsSubset
$bool
$anyElementTrue
None of the mentioned
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