Hash vs string for objects in Redis - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a string value for a key in Redis.

Redis

SET user:1000 [1]

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

A1000

BJohn

Cuser

D"John"

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting string values causes errors.

Using a key name as the value.

The SET command stores a string value. The value must be quoted if it contains spaces or special characters.

2fill in blank

medium

Complete the code to set a field in a Redis hash.

Redis

HSET user:1000 [1] "John"

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

Aname

Buser

C1000

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using the key name as the field.

Confusing field and value.

The HSET command sets a field in a hash. The field name here is name.

3fill in blank

hard

Fix the error in the command to get a field from a Redis hash.

Redis

HGET user:1000 [1]

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

A1000

Bname

Cuser

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using the key name instead of the field.

Using the value instead of the field.

The HGET command requires the field name to retrieve its value from the hash.

4fill in blank

hard

Fill both blanks to set multiple fields in a Redis hash.

Redis

HMSET user:1000 [1] [2]

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

A"name" "John"

B"age" "30"

C"user" "1000"

D"value" "data"

Attempts:

3 left

💡 Hint

Common Mistakes

Using key names instead of field-value pairs.

Not pairing fields with values.

The HMSET command sets multiple fields and values in a hash. Each field and its value are paired.

5fill in blank

hard

Fill all three blanks to retrieve multiple fields from a Redis hash.

Redis

HMGET user:1000 [1] [2] [3]

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

Aname

Bage

Cemail

Duser

Attempts:

3 left

💡 Hint

Common Mistakes

Using the key name as a field.

Not listing multiple fields.

The HMGET command retrieves multiple fields from a hash. You list the fields you want.