MULTI command to start in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a Redis transaction using MULTI.

Redis

[1]

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

ADISCARD

BEXEC

CWATCH

DMULTI

Attempts:

3 left

💡 Hint

Common Mistakes

Using EXEC instead of MULTI to start the transaction.

Using WATCH which is for monitoring keys, not starting transactions.

The MULTI command starts a transaction block in Redis.

2fill in blank

medium

Complete the code to queue a command inside a Redis transaction after starting MULTI.

Redis

MULTI
SET mykey [1]

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

AWATCH

BEXEC

Cmyvalue

DGET

Attempts:

3 left

💡 Hint

Common Mistakes

Using EXEC or WATCH as the value argument.

Using GET which is a command, not a value.

Inside a transaction, commands like SET are queued with their arguments, here the value myvalue.

3fill in blank

hard

Fix the error in the code to properly execute the queued commands in a Redis transaction.

Redis

MULTI
SET key1 value1
[1]

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

AEXEC

BDISCARD

CMULTI

DWATCH

Attempts:

3 left

💡 Hint

Common Mistakes

Using MULTI again instead of EXEC to execute.

Using DISCARD which cancels the transaction.

The EXEC command runs all queued commands in the transaction.

4fill in blank

hard

Fill both blanks to start a transaction and watch a key for changes before queuing commands.

Redis

[1] mykey
[2]

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

AWATCH

BEXEC

CMULTI

DDISCARD

Attempts:

3 left

💡 Hint

Common Mistakes

Starting MULTI before WATCH.

Using EXEC or DISCARD instead of MULTI to start the transaction.

WATCH monitors keys for changes, then MULTI starts the transaction.

5fill in blank

hard

Fill all three blanks to watch a key, start a transaction, and discard it if needed.

Redis

[1] mykey
[2]
[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 cancel.

Starting MULTI before WATCH.

First WATCH the key, then MULTI to start the transaction, and DISCARD to cancel it if needed.