MongoDB Aggregation Framework Basics: Beginner-Level Quiz

MongoDB Aggregation Framework Basics Quiz

This quiz evaluates your understanding of MongoDB's aggregation framework, including key stages like $match, $group, $project, and $unwind. Mastery of these concepts is essential for efficiently processing, transforming, and analyzing data in MongoDB.

1 / 20

Which of the following stages allows you to calculate averages, sums, or counts?

$group

$unwind

$lookup

$project

2 / 20

Which of the following stages allows you to rename fields in the output documents?

$limit

$match

$group

$project

3 / 20

What is the difference between $count and $group stages?

$count returns a single count, while $group aggregates documents by field values

$group is faster than $count

Both perform the same function

$count aggregates documents based on a field

4 / 20

What is the purpose of the $skip stage in an aggregation pipeline?

Limits the document size

Joins two collections

Skips a specified number of documents

Filters out duplicate documents

5 / 20

What is the primary purpose of the aggregation framework in MongoDB?

To enforce schema validation

To modify data types within collections

To manage transactions across multiple collections

To process and transform data within collections

6 / 20

The $unwind stage only works with arrays. True or False?

True

False

7 / 20

The order of stages in an aggregation pipeline does not affect the final result. True or False?

True

False

8 / 20

Aggregation's operations process data records and return computed results. True or False?

True

False

9 / 20

What does the $project stage do in an aggregation pipeline?

Filters documents based on conditions

Specifies which fields to include or exclude in the output

Creates a new collection with the results

Groups documents by a specified field

10 / 20

The $facet stage allows you to run multiple queries in parallel within the same aggregation pipeline. True or False?

True

False

11 / 20

Which of the following options best describes the $addFields stage?

Joins two collections

Aggregates documents into groups

Removes duplicate documents

Adds or modifies fields in the documents

12 / 20

The $group stage is used to summarize data by grouping documents based on specific fields. True or False?

True

False

13 / 20

Aggregation operations in MongoDB ___ values from multiple documents.

Set

Data set

Group

None of the mentioned above

14 / 20

Which of the following is the correct syntax for starting an aggregation pipeline?

db.collection.aggregate([ ... ])

db.collection.startPipeline({ ... })

db.collection.aggregatePipeline({ ... })

db.collection.pipelineAggregate([ ... ])

15 / 20

Which aggregation stage is used to deconstruct an array field into multiple documents?

$sort

$unwind

$group

$project

16 / 20

The $facet stage is used to run multiple aggregation pipelines within a single query. True or False?

True

False

17 / 20

Which of the following stages can combine multiple arrays from a document into a single array?

$mergeObjects

$group

$project

$arrayElemAt

18 / 20

Which MongoDB aggregation pipeline stage is used to lter documents based on specic criteria?

$group

$smatch

$sort

$project

19 / 20

Which of the following is NOT a valid aggregation pipeline stage?

$match

$project

$group

$index

20 / 20

What does the $out stage do in an aggregation pipeline?

Limits the size of the output

Joins documents from two collections

Writes the aggregation results to a new or existing collection

Sorts the output documents

Your score is

The average score is 0%

MongoDB Aggregation Framework Basics covers MongoDB’s aggregation framework’s fundamental concepts and operations. It includes understanding stages like $match, $group, $sort, and $project.

It also covers how they can be combined in a pipeline to perform complex queries, filtering, grouping, and data sorting. This quiz provides the foundation for more advanced data analysis and manipulation in MongoDB.

Best of luck!