Aggregation Pipeline Basics MCQ , MongoDB Aggregation Practice Questions

Direction: Choose the correct option

What is the aggregation pipeline in MongoDB?

A. A backup process

B. A framework for data transformation and analysis

C. A type of join operation

D. A method to combine collections

Direction: Choose the correct option

Which method is used to perform aggregation?

A. db.collection.pipeline()

B. db.collection.group()

C. db.collection.aggregate()

D. db.collection.transform()

Direction: Choose the correct option

What does the `$match` stage do in an aggregation pipeline?

A. Filters documents to pass only those that match the condition

B. Sorts documents

C. Creates a new field

D. Matches two collections together

Direction: Choose the correct option

What is the purpose of the `$group` stage?

A. To group documents by a specified key and perform aggregate functions

B. To project specific fields

C. To limit the number of documents

D. To sort documents

Direction: Choose the correct option

Which stage would you use to reshape a document by including, excluding, or adding fields?

A. $set

B. $reshape

C. $addFields

D. $project

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