Redis data model (key-value) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a key named 'user:1' with the value 'Alice'.

Redis

SET user:1 [1]

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

Auser

BAlice

C1

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using the key name as the value

Using a number instead of the name

The SET command stores the value 'Alice' under the key 'user:1'.

2fill in blank

medium

Complete the code to get the value stored at key 'session:123'.

Redis

GET [1]

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

Auser:123

Bsession

Csession:123

D123

Attempts:

3 left

💡 Hint

Common Mistakes

Using only part of the key

Using a value instead of a key

The GET command retrieves the value stored at the key 'session:123'.

3fill in blank

hard

Fix the error in the command to delete the key 'cache:item'.

Redis

DEL [1]

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

Acache:item

Bcacheitem

Ccache_item

Dcache-item

Attempts:

3 left

💡 Hint

Common Mistakes

Replacing colon with dash or underscore

Using partial key names

The key name must match exactly. The key is 'cache:item' with a colon, not a dash or underscore.

4fill in blank

hard

Fill both blanks to set a key 'product:45' with value 'Book' and then retrieve it.

Redis

[1] product:45 Book
[2] product:45

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

ASET

BGET

CDEL

DEXPIRE

Attempts:

3 left

💡 Hint

Common Mistakes

Using DEL instead of GET to retrieve

Using EXPIRE instead of SET to store

First, use SET to store the value 'Book' at 'product:45'. Then use GET to retrieve it.

5fill in blank

hard

Fill all three blanks to set a key 'order:100' with value 'Pending', update it to 'Shipped', and then get the updated value.

Redis

[1] order:100 Pending
[2] order:100 Shipped
[3] order:100

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

ADEL

BSET

CGET

DEXPIRE

Attempts:

3 left

💡 Hint

Common Mistakes

Using DEL to update a key

Using EXPIRE instead of SET

Trying to GET before setting a value

Use SET to create and update the key's value, then GET to retrieve the latest value.