MongoDB Mock Test 7 - Sanfoundry

10%

Question 1 of 10

1. Which of the following provides similar functionality to join?

$unwind

None of the mentioned

$unwin

$unwindelem

Question 1 of 10

Question 2 of 10

2. Which of the following returns the value that results from applying an expression to the last document?

$end

All of the mentioned

$last

$max

Question 2 of 10

Question 3 of 10

3. MongoDB converts the JavaScript objects emitted by the map function to ________ objects.

None of the mentioned

BSON

JSON

Javascript

Question 3 of 10

Question 4 of 10

4. Which of the following returns a substring of a string?

$substring

$subs

$substr

None of the mentioned

Question 4 of 10

Question 5 of 10

5. MongoDB can use the _________ of indexes to fulfill queries.

intersection

union

none of the mentioned

projection

Question 5 of 10

Question 6 of 10

6. $sum is an accumulator operator available only in the _______ stage.

$group

None of the mentioned

$accumulator

$sets

Question 6 of 10

Question 7 of 10

7. __________ returns the highest value from the group of values in documents.

$maximum

$end

$last

$max

Question 7 of 10

Question 8 of 10

8. Which of the following accepts named parameters?

$letnum

$reduce

None of the mentioned

$let

Question 8 of 10

Question 9 of 10

9. Point out the correct statement.

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

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

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

All of the mentioned

Question 9 of 10

Question 10 of 10

10. __________ returns the date as a formatted string.

$letString

$toString

None of the mentioned

$dateToString

Question 10 of 10