HMSET and HMGET for bulk in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set multiple fields in a Redis hash using HMSET.

Redis

HMSET user:1000 [1]

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

A"name" "Alice"

B"name" "Alice" "age" "30"

C"user" "1000"

D"age" "30"

Attempts:

3 left

💡 Hint

Common Mistakes

Providing only one field-value pair when multiple are needed.

Using incorrect syntax without quotes around strings.

The HMSET command requires field-value pairs to set multiple fields at once. Option B provides both fields and their values.

2fill in blank

medium

Complete the code to retrieve multiple fields from a Redis hash using HMGET.

Redis

HMGET user:1000 [1]

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

A"email"

B"user" "1000"

C"name"

D"name" "age"

Attempts:

3 left

💡 Hint

Common Mistakes

Requesting only one field when multiple are needed.

Using the key as a field name.

HMGET retrieves the values of the specified fields. To get multiple fields, list them all after the key.

3fill in blank

hard

Fix the error in the HMSET command to correctly set multiple fields.

Redis

HMSET user:1000 [1]

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

A"name" "Alice" "age" "30"

Bname Alice age 30

C"name" "Alice" age 30

Dname, Alice, age, 30

Attempts:

3 left

💡 Hint

Common Mistakes

Using commas between fields and values.

Not quoting string values.

HMSET requires each field and value to be quoted strings without commas. Option A is the correct syntax.

4fill in blank

hard

Fill both blanks to set and then get multiple fields in Redis.

Redis

HMSET user:2000 [1]
HMGET user:2000 [2]

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

A"city" "Paris" "country" "France"

B"city" "country"

C"Paris" "France"

D"country" "city"

Attempts:

3 left

💡 Hint

Common Mistakes

Using values instead of field names in HMGET.

Mixing order of fields and values.

HMSET needs field-value pairs (option A). HMGET needs the field names to retrieve (option B).

5fill in blank

hard

Fill all three blanks to set multiple fields, then retrieve them in Redis.

Redis

HMSET user:3000 [1]
HMGET user:3000 [2]
HMGET user:3000 [3]

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

A"first_name" "John" "last_name" "Doe"

B"first_name" "last_name"

C"John" "Doe"

D"age" "email"

Attempts:

3 left

💡 Hint

Common Mistakes

Using values instead of field names in HMGET.

HMSET sets fields and values (A). The first HMGET retrieves the name fields (B). The second HMGET retrieves other fields (D).