Commit and abort behavior in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a transaction in MongoDB.

MongoDB

const session = client.startSession();
session.[1]();

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AcommitTransaction

BendSession

CabortTransaction

DstartTransaction

Attempts:

3 left

💡 Hint

Common Mistakes

Using commitTransaction instead of startTransaction.

Calling endSession before starting a transaction.

To begin a transaction, you must call startTransaction() on the session.

2fill in blank

medium

Complete the code to commit a transaction in MongoDB.

MongoDB

await session.[1]();

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AstartTransaction

BcommitTransaction

CabortTransaction

DendSession

Attempts:

3 left

💡 Hint

Common Mistakes

Using abortTransaction instead of commitTransaction.

Calling startTransaction again instead of committing.

To save all changes made in a transaction, use commitTransaction().

3fill in blank

hard

Fix the error in aborting a transaction in MongoDB.

MongoDB

await session.[1]();

Drag options to blanks, or click blank then click option'

AabortTransaction

BstartTransaction

CcommitTransaction

DendSession

Attempts:

3 left

💡 Hint

Common Mistakes

Using commitTransaction instead of abortTransaction.

Calling endSession instead of aborting.

To cancel all changes in a transaction, use abortTransaction().

4fill in blank

hard

Fill both blanks to correctly use a transaction with commit and session end.

MongoDB

try {
  await session.[1]();
  // perform operations
  await session.[2]();
} finally {
  await session.endSession();
}

Drag options to blanks, or click blank then click option'

AcommitTransaction

BstartTransaction

CabortTransaction

DendSession

Attempts:

3 left

💡 Hint

Common Mistakes

Committing before starting the transaction.

Using abortTransaction instead of commitTransaction.

Start the transaction with startTransaction() and commit it with commitTransaction().

5fill in blank

hard

Fill all three blanks to abort a transaction and end the session properly.

MongoDB

try {
  await session.[1]();
  // perform operations
  if (error) {
    await session.[2]();
  } else {
    await session.commitTransaction();
  }
} finally {
  await session.[3]();
}

Drag options to blanks, or click blank then click option'

AstartTransaction

BabortTransaction

CendSession

DcommitTransaction

Attempts:

3 left

💡 Hint

Common Mistakes

Not ending the session after aborting.

Using commitTransaction instead of abortTransaction on error.

Start the transaction, abort if error, and always end the session.