Ultimate Mongodb Test - 78+ MCQs: MongoDB test: Assess Your Knowledge with MongoDB Questions and Answers

1. Which operator is used to update a specific field in a document?

$set

$modify

$update

$change

2. How does MongoDB handle transactions, and what types of operations support transactions?

Concurrency control

Data validation

Data modeling

Atomic operations

3. Which aggregation stage is used to group documents by multiple fields?

$match

$group

$project

$sort

4. Explain the significance of the ObjectId in MongoDB documents.

Primary key

Timestamp

Foreign key

Random identifier

5. In MongoDB, what is a capped collection?

A collection with a maximum size

A collection with predefined documents

A collection with nested documents

A collection with unlimited storage

6. What is the purpose of the `ttl` index type in MongoDB?

To store timestamps

To perform text search

To create a time-to-live index

To encrypt data

7. What is the purpose of the `db.createView()` method in MongoDB?

To create a new database

To create a new collection

To create a view on an existing collection

To create an index on a collection

8. How can you perform an upsert operation in MongoDB?

db.updateOne()

db.insert()

db.save()

db.upsert()

9. How does MongoDB handle data consistency in a distributed environment?

Eventual consistency

Data compression

Data validation

Immediate consistency

10. What is a sharded cluster in MongoDB, and why might it be used?

Replication mechanism

Distributed database

Security layer

Indexing strategy

MongoDB MCQ Test 5