Learn MongoDB MCQs
Prepare MongoDB MCQs (Multiple choice Questions) for exam and job interviews.
Which of the following is a valid MongoDB query operator?
1) $gt
2) $greaterThan
3) $moreThan
4) $largerThan
Answer : Option 1
What does the `MongoDB Shell` allow you to do?
1) Manage MongoDB databases
2) Create web applications
3) Write JavaScript code
4) Analyze data
Answer : Option 1
What is the default data type for a field in MongoDB?
1) Object
2) String
3) Number
4) BSON
Answer : Option 4
Which command is used to find a specific document by its ID?
1) db.collection_name.getById()
2) db.collection_name.find({ _id: id })
3) db.collection_name.findById()
4) db.collection_name.queryById()
Answer : Option 2
What is the primary purpose of MongoDB replication?
1) To improve data availability and redundancy
2) To enhance data retrieval speed
3) To store data in multiple formats
4) To reduce data size
Answer : Option 1
Which command is used to drop a collection in MongoDB?
1) db.collection_name.dropCollection()
2) db.collection_name.delete()
3) db.collection_name.drop()
4) db.collection_name.remove()
Answer : Option 3
What is the main purpose of the `$group` stage in MongoDB?
1) To group documents by a specified field
2) To filter documents
3) To sort documents
4) To join collections
Answer : Option 1
Which operator is used to filter documents based on the existence of a field?
1) $exists
2) $has
3) $contains
4) $isPresent
Answer : Option 1
What is the command to remove a document in MongoDB?
1) db.collection_name.deleteOne()
2) db.collection_name.removeOne()
3) db.collection_name.delete()
4) db.collection_name.remove()
Answer : Option 1
What is the role of a `MongoDB driver`?
1) To connect applications to the MongoDB database
2) To store data in MongoDB
3) To create indexes
4) To manage collections
Answer : Option 1