Temporary data with TTL in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a key with a value in Redis.

Redis

SET mykey [1]

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

A"Hello"

BEX 10

CDEL

DGET

Attempts:

3 left

💡 Hint

Common Mistakes

Using EX 10 immediately after SET without a value.

Using DEL or GET instead of a value.

The SET command requires the key and the value. Here, the value is "Hello".

2fill in blank

medium

Complete the code to set a key with a value and an expiration time of 30 seconds.

Redis

SET mykey "Hello" [1] 30

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

APX

BTTL

CEX

DPTTL

Attempts:

3 left

💡 Hint

Common Mistakes

Using PX which sets expiration in milliseconds.

Using TTL or PTTL which are commands, not options here.

The EX option sets the expiration time in seconds.

3fill in blank

hard

Fix the error in the command to set a key with expiration of 60 seconds.

Redis

SET mykey "World" [1]

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

AEXPIRE 60

BTTL 60

CPX 60000

DEX 60

Attempts:

3 left

💡 Hint

Common Mistakes

Using TTL or EXPIRE as options in SET command.

Using PX 60000 which is milliseconds, but the question expects seconds.

The correct syntax to set expiration during SET is EX 60 for 60 seconds.

4fill in blank

hard

Fill both blanks to set a key with value and expiration in milliseconds.

Redis

SET mykey [1] [2] 15000

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

A"Temporary"

BEX

CPX

D"Permanent"

Attempts:

3 left

💡 Hint

Common Mistakes

Using EX instead of PX for milliseconds.

Using "Permanent" as value when temporary data is needed.

Use PX to set expiration in milliseconds and provide the value "Temporary".

5fill in blank

hard

Fill all three blanks to set a key with value and expiration, then check its TTL.

Redis

SET [1] [2] EX 20
TTL [3]

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

Asession_token

B"abc123"

D"xyz789"

Attempts:

3 left

💡 Hint

Common Mistakes

Using different key names in SET and TTL commands.

Not using quotes around the value string.

Set key session_token with value "abc123" and expiration 20 seconds, then check TTL of session_token.