MongoDB Aggregation Pipelines Quiz

1. The $facet stage allows you to create multiple sub-pipelines within a single aggregation.

True

False

Submit

3. Which stage performs a full-text search on indexed fields?

$search

$text

$fulltext

$query

4. In aggregation, the $replaceRoot stage replaces each document with a new document structure.

True

False

Submit

6. Which operator concatenates strings in an aggregation expression?

$concat

$join

$merge

$combine

7. The $redact stage controls document field visibility based on specified conditions.

True

False

8. Which aggregation stage allows conditional operations on fields?

$cond

$if

$case

$switch

Submit

10. Which stage computes statistics for numeric values in documents?

$stats

$bucketAuto

$bucket

$variance

11. Which aggregation stage filters documents based on specified criteria?

$match

$filter

$where

$find

12. Which operator counts documents in a $group stage?

$count

$size

$sum with 1

$total

Submit

14. Which stage allows you to limit the number of documents passed to the next stage?

$skip

$limit

$slice

$cap

Submit

16. What is the purpose of the $unwind stage?

Deconstructs arrays into separate documents

Combines multiple arrays

Filters out array fields

Sorts array elements

17. Which stage performs a left outer join with another collection?

$lookup

$join

$merge

$combine

Submit

19. Which operator is used to sum values in a $group stage?

$add

$sum

$total

$aggregate

20. What does the $group stage do in an aggregation pipeline?

Joins documents from multiple collections

Groups documents by a key and performs aggregation operations

Sorts documents in ascending order

Limits the number of returned documents

MongoDB Developer Aggregation Pipelines Quiz

1. The $facet stage allows you to create multiple sub-pipelines within a single aggregation.

2.

What first name or nickname would you like us to use?

2. The $geoNear stage is used to query documents by ____.

3. Which stage performs a full-text search on indexed fields?

4. In aggregation, the $replaceRoot stage replaces each document with a new document structure.

5. The $addFields stage allows you to ____.

6. Which operator concatenates strings in an aggregation expression?

7. The $redact stage controls document field visibility based on specified conditions.

8. Which aggregation stage allows conditional operations on fields?

9. The $out stage in aggregation is used to ____.

10. Which stage computes statistics for numeric values in documents?

11. Which aggregation stage filters documents based on specified criteria?

12. Which operator counts documents in a $group stage?

13. The $skip stage in aggregation is used to ____.

14. Which stage allows you to limit the number of documents passed to the next stage?

15. In aggregation, the $sort stage is used to ____.

16. What is the purpose of the $unwind stage?

17. Which stage performs a left outer join with another collection?

18. The $project stage in aggregation is used to ____.

19. Which operator is used to sum values in a $group stage?

20. What does the $group stage do in an aggregation pipeline?