DISCARD to abort in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to abort a Redis transaction using the DISCARD command.

Redis

MULTI
SET key1 value1
[1]

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

ADISCARD

BEXEC

CWATCH

DCOMMIT

Attempts:

3 left

💡 Hint

Common Mistakes

Using EXEC instead of DISCARD will execute the transaction instead of aborting it.

Using WATCH or COMMIT are not valid commands to abort a transaction.

The DISCARD command aborts the current transaction in Redis, discarding all queued commands.

2fill in blank

medium

Complete the code to start a transaction and then abort it properly.

Redis

MULTI
INCR counter
[1]

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

AEXEC

BSAVE

CROLLBACK

DDISCARD

Attempts:

3 left

💡 Hint

Common Mistakes

Using ROLLBACK which is not supported in Redis.

Using EXEC which executes the transaction instead of aborting.

After starting a transaction with MULTI, DISCARD aborts it, discarding all queued commands.

3fill in blank

hard

Fix the error in the code to abort the transaction correctly.

Redis

MULTI
SET user:1 name Alice
[1]

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

AEXEC

BSAVE

CDISCARD

DCOMMIT

Attempts:

3 left

💡 Hint

Common Mistakes

Using COMMIT which is not a Redis command.

Using EXEC which executes the transaction instead of aborting.

To abort a Redis transaction, use DISCARD. EXEC or COMMIT will execute the transaction.

4fill in blank

hard

Fill both blanks to start a transaction and then abort it.

Redis

[1]
HSET user:2 age 30
[2]

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

AMULTI

BDISCARD

CEXEC

DWATCH

Attempts:

3 left

💡 Hint

Common Mistakes

Using EXEC instead of DISCARD to abort.

Using WATCH to abort which only watches keys.

Use MULTI to start a transaction and DISCARD to abort it.

5fill in blank

hard

Fill all three blanks to watch a key, start a transaction, and then abort it.

Redis

[1] user:3
[2]
DEL user:3
[3]

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

AWATCH

BMULTI

CDISCARD

DEXEC

Attempts:

3 left

💡 Hint

Common Mistakes

Using EXEC instead of DISCARD to abort.

Not using WATCH before MULTI when monitoring keys.

First, WATCH monitors the key, then MULTI starts the transaction, and DISCARD aborts it.