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Welcome to the Aggregation Concepts and Aggregation Mechanics MCQs Page

Dive deep into the fascinating world of Aggregation Concepts and Aggregation Mechanics with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Aggregation Concepts and Aggregation Mechanics, a crucial aspect of MongoDB. In this section, you will encounter a diverse range of MCQs that cover various aspects of Aggregation Concepts and Aggregation Mechanics, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within MongoDB.

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Check out the MCQs below to embark on an enriching journey through Aggregation Concepts and Aggregation Mechanics. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of MongoDB.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Aggregation Concepts and Aggregation Mechanics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Aggregation Concepts and Aggregation Mechanics MCQs | Page 6 of 12

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Q51.
Point out the wrong statement.

a.

Boolean expressions evaluate their argument expressions as booleans and return a boolean as the result

b.

In addition to the false boolean value, Boolean expression evaluates as false the following: null, 0, and undefined values

c.

Set expressions performs set operation on arrays, treating arrays as sets

d.

None of the mentioned

Discuss
Answer: (d).None of the mentioned
Q52.
________ returns a set with elements that appear in any of the input sets.

a.

$setIntersection

b.

$setDifference

c.

$setEquals

d.

$setUnion

Discuss
Answer: (d).$setUnion
Q53.
Which of the following performs a relative complement of the second set relative to the first?

a.

$setIntersection

b.

$setDifference

c.

$setEquals

d.

$setUnion

Discuss
Answer: (a).$setIntersection
Q54.
$setIsSubset returns _______ if all elements of the first set appear in the second set, including when the first set equals the second set.

a.

Null

b.

True

c.

False

d.

None of the mentioned

Discuss
Answer: (c).False
Q55.
_______ accepts only single argument expression.

a.

$setIsSubset

b.

$bool

c.

$anyElementTrue

d.

None of the mentioned

Discuss
Answer: (c).$anyElementTrue
Q56.
$allElementsTrue returns true if no element of a set evaluates to ____________

a.

false

b.

true

c.

0

d.

1

Discuss
Answer: (a).false
Q57.
Comparison expressions return a boolean except for ________ which returns a number.

a.

$copy

b.

$cmp

c.

$num

d.

None of the mentioned

Discuss
Answer: (b).$cmp
Q58.
Point out the correct statement.

a.

The comparison expressions take two argument expressions and compare both value and type, using the specified Java comparison order for values of different types

b.

$gte returns true if the first value is greater than the second

c.

$gte returns true if the first value is greater than or equal to the second

d.

All of the mentioned

Discuss
Answer: (c).$gte returns true if the first value is greater than or equal to the second
Q59.
______ returns true if the first value is less than the second.

a.

$lte

b.

$lt

c.

$setEquals

d.

None of the mentioned

Discuss
Answer: (b).$lt
Q60.
$ne returns true if the values are not _______

a.

equivalent

b.

null

c.

0

d.

none of the mentioned

Discuss
Answer: (a).equivalent
Page 6 of 12

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