HEXISTS for field check in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the field 'name' exists in the hash 'user:1000'.

Redis

HEXISTS user:1000 [1]

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

Aaddress

Bage

Cname

Demail

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong field name will return 0 even if the hash exists.

Confusing the hash key with the field name.

The HEXISTS command checks if a specific field exists in a hash. Here, we want to check the field name.

2fill in blank

medium

Complete the code to check if the field 'email' exists in the hash 'user:2000'.

Redis

HEXISTS [1] email

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

Auser:1000

Buser:2000

Cuser:3000

Duser:4000

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong user key will cause the check to fail.

Swapping the field and key arguments.

The command checks the field email in the hash user:2000.

3fill in blank

hard

Fix the error in the command to check if the field 'phone' exists in the hash 'contact:500'.

Redis

HEXISTS contact:500 [1]

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

Aphone

Bphones

Cphone_number

Dcontact

Attempts:

3 left

💡 Hint

Common Mistakes

Using a similar but incorrect field name.

Adding extra words or underscores.

The field name must exactly match the stored field. Here, it is phone.

4fill in blank

hard

Fill both blanks to check if the field 'status' exists in the hash 'order:1234'.

Redis

HEXISTS [1] [2]

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

Aorder:1234

Buser:1234

Cstatus

Dstate

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the hash key and field.

Using incorrect field or key names.

The command checks the field status in the hash order:1234.

5fill in blank

hard

Fill all three blanks to check if the field 'price' exists in the hash 'product:789' using the Redis CLI command.

Redis

[1] [2] [3]

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

AHEXISTS

Bproduct:789

Cprice

DHGET

Attempts:

3 left

💡 Hint

Common Mistakes

Using HGET instead of HEXISTS.

Swapping the order of arguments.

The Redis CLI command to check a field in a hash is HEXISTS followed by the hash key and the field name.