Understanding MongoDB Transactions: Intermediate-Level Quiz

Understanding MongoDB Transactions

This quiz focuses on MongoDB's transaction capabilities, exploring how transactions ensure ACID compliance, manage multi-document operations and handle consistency in replica sets and sharded clusters. Test your understanding of starting, committing, and aborting transactions, along with their key features and limitations. Good luck!

1 / 20

What happens if the primary node in a replica set fails during a transaction?

The transaction is aborted and will need to be retried once a new primary is elected

The transaction is automatically committed

The transaction is paused until the primary node recovers

The transaction continues on the secondary node

2 / 20

What happens if you don't explicitly commit or abort a transaction in MongoDB?

The transaction remains open indefinitely

The transaction continues without any issues

The transaction is committed automatically

The transaction times out and is aborted

3 / 20

Transactions in MongoDB can operate across multiple databases within the same deployment. True or False?

True

False

4 / 20

MongoDB transactions are only supported in replica sets. True or False?

True

False

5 / 20

Transactions in MongoDB are supported across sharded clusters starting from version 4.2. True or False?

True

False

6 / 20

If a transaction fails to commit, you must manually abort it using session.abortTransaction(). True or False?

True

False

7 / 20

What happens if a MongoDB transaction encounters an error?

The transaction is aborted and all changes are rolled back

The transaction continues until completion

The transaction is ignored

Only part of the transaction is rolled back

8 / 20

What is the maximum duration a MongoDB transaction can run before being aborted?

1 minute

30 seconds

15 minutes

20 seconds

9 / 20

What is the role of the writeConcern option in MongoDB transactions?

To ensure the durability of writes in the transaction

To control the transaction’s isolation level

To define the transaction timeout

To manage read operations in a transaction

10 / 20

What is the key feature of a MongoDB transaction?

It ensures ACID properties for multi-document operations

It allows schema enforcement

It improves query performance

It enables sharding

11 / 20

How is a transaction committed in MongoDB?

db.runCommand({commitTransaction: 1})

session.runTransaction()

session.commitTransaction()

db.commitTransaction()

12 / 20

Which of the following statements is true about transactions in a MongoDB sharded cluster?

Transactions are not supported in sharded clusters

Transactions can span multiple shards starting from MongoDB 4.2

Sharded clusters require custom transactions

Transactions can only be performed on a single shard

13 / 20

Which isolation level does MongoDB transactions provide by default?

Read Committed

Read Uncommitted

Serializable

Snapshot Isolation

14 / 20

Which command is used to abort a transaction in MongoDB?

db.abortTransaction()

db.endTransaction()

session.rollback()

session.abortTransaction()

15 / 20

Which command is used to start a transaction in MongoDB?

session.runTransaction()

db.runCommand({startTransaction: 1})

db.startTransaction()

session.startTransaction()

16 / 20

What is a key difference between MongoDB transactions and traditional SQL transactions?

MongoDB transactions are optimized for short-lived operations, unlike long-running SQL transactions

SQL transactions are faster than MongoDB transactions

MongoDB transactions do not support rollback

MongoDB transactions support full ACID compliance

17 / 20

MongoDB transactions provide atomicity only at the document level, not across multiple documents. True or False?

True

False

18 / 20

Which of the following is a valid use case for MongoDB transactions?

Full-text search

Banking or financial applications requiring consistent multi-document updates

Query optimization

Real-time analytics

19 / 20

In MongoDB, what does the readConcern option control within a transaction?

The write durability

The consistency of write operations

Transaction timeout

The level of isolation for read operations

20 / 20

Which of the following is true regarding write operations in a MongoDB transaction?

Write operations are applied only after the transaction is successfully committed

Write operations are rolled back automatically

Write operations are committed immediately

Write operations are partially committed

Your score is

The average score is 0%

Understanding MongoDB Transactions involves learning to manage multi-document operations with ACID (Atomicity, Consistency, Isolation, Durability) guarantees.

It covers starting, committing, and aborting transactions, handling concurrency, and best practices for ensuring data integrity in complex workflows.

This MongoDB Transaction quiz is ideal for professionals seeking to test their knowledge in ensuring data integrity in complex workflows.

All the best.