PERSIST to remove expiry in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to remove the expiration from the key 'session'.

Redis

PERSIST [1]

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

Atimeout

Bexpire

Csession

Dkey

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'expire' or 'timeout' instead of the actual key name.

Forgetting to specify the key name.

The PERSIST command removes the expiration from the specified key. Here, the key is 'session'.

2fill in blank

medium

Complete the code to check if the expiration was removed from the key 'user123'.

Redis

TTL [1]

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

Aexpire

Btimeout

Csession

Duser123

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'expire' or 'timeout' instead of the key name.

Confusing the command with PERSIST.

The TTL command returns the time to live of a key. Using 'user123' checks the expiration of that key.

3fill in blank

hard

Fix the error in the command to remove expiry from the key 'cache'.

Redis

PERSIST [1]

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

Aexpire

Bcache

Ccache_key

Dtimeout

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong key name like 'cache_key' instead of 'cache'.

Using command names as key names.

The key name must exactly match the key you want to remove expiry from. Here, 'cache' is correct.

4fill in blank

hard

Fill both blanks to remove expiry from 'token' and check its TTL.

Redis

PERSIST [1]
TTL [2]

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

Atoken

Bsession

Dcache

Attempts:

3 left

💡 Hint

Common Mistakes

Using different key names in the two commands.

Using wrong key names like 'session' or 'cache'.

First, remove expiry from the key 'token' using PERSIST. Then check TTL of 'token' to confirm expiry is removed.

5fill in blank

hard

Fill all three blanks to remove expiry from 'auth', check TTL, and set expiry to 60 seconds if TTL is -1.

Redis

PERSIST [1]
TTL [2]
EXPIRE [3] 60

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

Aauth

Dsession

Attempts:

3 left

💡 Hint

Common Mistakes

Using different key names in commands.

Confusing PERSIST and EXPIRE commands.

Remove expiry from 'auth' with PERSIST, check TTL of 'auth', then set expiry to 60 seconds if needed.