HDEL for field removal in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to remove a field named 'age' from the hash 'user:1000'.

Redis

HDEL user:1000 [1]

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

Aage

Bname

Cemail

Daddress

Attempts:

3 left

💡 Hint

Common Mistakes

Using the hash key instead of the field name.

Trying to remove a field that does not exist.

The HDEL command removes the specified field from the hash. Here, 'age' is the field to remove.

2fill in blank

medium

Complete the code to remove the field 'email' from the hash 'contact:1234'.

Redis

HDEL [1] email

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

Acontact:1234

Buser:1000

Cprofile:5678

Dsession:4321

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the hash key and field name positions.

Using a wrong or non-existing hash key.

The HDEL command requires the hash key first, then the field name. Here, 'contact:1234' is the hash key.

3fill in blank

hard

Fix the error in the command to remove the field 'phone' from the hash 'client:789'.

Redis

HDEL client:789 [1]

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

Aphones

Bphonenumber

CPhone

Dphone

Attempts:

3 left

💡 Hint

Common Mistakes

Using a plural or different variation of the field name.

Using incorrect capitalization.

The field name must exactly match the one stored in the hash. Here, the correct field is 'phone' in lowercase.

4fill in blank

hard

Fill both blanks to remove the field 'status' from the hash 'order:555'.

Redis

HDEL [1] [2]

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

Aorder:555

Buser:555

Cstatus

Dstate

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up hash key and field name.

Using incorrect field names.

The first blank is the hash key 'order:555', and the second blank is the field name 'status' to remove.

5fill in blank

hard

Fill both blanks to remove the field 'email' from the hash 'profile:2023' and confirm the command.

Redis

HDEL [1] [2] 

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

Aprofile:2023

Bemail

Attempts:

3 left

💡 Hint

Common Mistakes

Adding extra fields when not needed.

Leaving blanks empty when required.

The command syntax is HDEL key field [field ..]. Here, only one field 'email' is removed, so the third blank is empty (no extra field).