Why strings are Redis's simplest type - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a string value in Redis.

Redis

SET mykey [1]

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

ADEL

B123

CGET

DHello

Attempts:

3 left

💡 Hint

Common Mistakes

Using a command like GET or DEL instead of a string value.

The SET command stores a string value. Here, "Hello" is the string to store.

2fill in blank

medium

Complete the code to retrieve the string value stored in Redis.

Redis

GET [1]

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

Amyvalue

Bmykey

Cvalue

Dstring

Attempts:

3 left

💡 Hint

Common Mistakes

Using the value instead of the key name.

GET command retrieves the value stored at the key. Here, the key is 'mykey'.

3fill in blank

hard

Fix the error in the command to append to a string value in Redis.

Redis

APPEND [1] " World"

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

Amykey

Bmyvalue

Cvalue

Dstring

Attempts:

3 left

💡 Hint

Common Mistakes

Using the value or wrong key name instead of the key.

APPEND command adds text to the string stored at the key. The key must be correct, here 'mykey'.

4fill in blank

hard

Fill both blanks to increment a numeric string value in Redis.

Redis

INCRBY [1] [2]

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

Acounter

B5

C10

Dmykey

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-numeric value for increment.

Using wrong key name.

INCRBY increments the numeric string at the key by the given number. 'counter' is the key, '5' is the increment.

5fill in blank

hard

Fill all three blanks to set a string with expiration time in Redis.

Redis

SET [1] [2] EX [3]

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

Asession_id

Babc123

C300

Duser_token

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes for string value.

Using wrong key or expiration time.

SET command with EX sets a key with a string value and expiration time in seconds. 'session_id' is the key, '"abc123"' is the string, '300' is the expiration time.