MongoDB Transactions and Error Handling Quiz

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2. Which writeConcern level guarantees durability across a majority of replicas in a transaction?

W: 0

W: 1

W: 'majority'

W: 'all'

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4. What does the 'readConcern' option control in a MongoDB transaction?

The visibility of data written by concurrent operations

The speed at which reads are executed

The number of replicas that must acknowledge a write

The encryption level for read operations

5. True or False: Read operations within a transaction can see uncommitted changes from other concurrent transactions.

True

False

6. Which of these is a best practice for error handling in MongoDB transactions?

Implement exponential backoff retry logic for transient errors

Always retry immediately without any delay

Log all errors but never retry transactions

Ignore WriteConflict errors and continue normally

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8. What is the maximum duration a single transaction can run in MongoDB?

30 seconds

1 minute

5 minutes

10 minutes

9. True or False: A transaction automatically commits if you close the session without explicitly calling commitTransaction().

True

False

10. Which exception is raised when a session times out in MongoDB?

SessionExpiredException

TransactionTimeoutException

SessionNotFound

OperationTimeoutException

11. What is the primary purpose of multi-document transactions in MongoDB?

To ensure ACID compliance across multiple documents or collections

To increase query performance on large datasets

To automatically shard data across multiple servers

To compress data and reduce storage requirements

12. What error typically indicates a transaction conflict in MongoDB?

WriteConflict

TransactionAborted

SessionExpired

DeadlockDetected

13. True or False: MongoDB transactions can span multiple databases in a sharded cluster.

True

False

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15. What happens when you call commitTransaction() on a session?

All changes in the transaction are permanently applied

All changes are rolled back to the initial state

The transaction is paused until manually resumed

The session is terminated and cannot be reused

16. Which method starts a new transaction in a MongoDB session?

Session.startTransaction()

Session.beginTransaction()

Session.openTransaction()

Session.initTransaction()

17. What is the default transaction isolation level in MongoDB?

Read Uncommitted

Read Committed

Repeatable Read

Serializable

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19. What does the 'Atomicity' in ACID transactions guarantee?

All operations in a transaction complete or none do

Data consistency across all database replicas

Transactions execute faster than individual operations

Automatic rollback after a set timeout period

20. Which MongoDB version introduced support for multi-document ACID transactions?

3.6

4.0

4.2

5.0

MongoDB Developer Transactions and Error Handling Quiz

1. When a TransactionAborted error occurs, the recommended action is to ______ the transaction.

2.

What first name or nickname would you like us to use?

2. Which writeConcern level guarantees durability across a majority of replicas in a transaction?

3. In MongoDB transactions, 'Isolation' ensures that concurrent transactions do not ______ each other's data.

4. What does the 'readConcern' option control in a MongoDB transaction?

5. True or False: Read operations within a transaction can see uncommitted changes from other concurrent transactions.

6. Which of these is a best practice for error handling in MongoDB transactions?

7. The transactionNumber field in a transaction is used to ______ idempotency across retries.

8. What is the maximum duration a single transaction can run in MongoDB?

9. True or False: A transaction automatically commits if you close the session without explicitly calling commitTransaction().

10. Which exception is raised when a session times out in MongoDB?

11. What is the primary purpose of multi-document transactions in MongoDB?

12. What error typically indicates a transaction conflict in MongoDB?

13. True or False: MongoDB transactions can span multiple databases in a sharded cluster.

14. The abortTransaction() method is used to ______ all changes made during a transaction.

15. What happens when you call commitTransaction() on a session?

16. Which method starts a new transaction in a MongoDB session?

17. What is the default transaction isolation level in MongoDB?

18. In MongoDB, a session is required to use multi-document transactions on a ______ deployment.

19. What does the 'Atomicity' in ACID transactions guarantee?

20. Which MongoDB version introduced support for multi-document ACID transactions?