Range queries for scoring in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get all members with scores between 50 and 100.

Redis

ZRANGEBYSCORE myset [1] 100

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

A-inf

B0

C100

D50

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 instead of 50 as the minimum score.

Using 100 as the minimum score which would return only scores >= 100.

The command ZRANGEBYSCORE retrieves members with scores in the given range. Here, the minimum score is 50.

2fill in blank

medium

Complete the code to get all members with scores less than or equal to 75.

Redis

ZRANGEBYSCORE myset [1] 75

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

A-inf

B0

C75

D100

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 as minimum score, which excludes negative scores if any.

Using 75 as minimum score, which returns only scores >= 75.

To get all members with scores up to 75, use -inf as the minimum score to include all lower scores.

3fill in blank

hard

Fix the error in the code to get members with scores between 20 and 40 inclusive.

Redis

ZRANGEBYSCORE myset 20 [1]

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

A50

B20

C40

D-inf

Attempts:

3 left

💡 Hint

Common Mistakes

Using 20 as maximum score which returns only scores <= 20.

Using 50 which includes scores beyond 40.

The maximum score should be 40 to get members with scores between 20 and 40 inclusive.

4fill in blank

hard

Fill both blanks to get members with scores strictly greater than 30 and less than or equal to 60.

Redis

ZRANGEBYSCORE myset [1] [2]

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

A(30

B30

C60

D(60

Attempts:

3 left

💡 Hint

Common Mistakes

Using 30 instead of (30, which includes 30.

Using (60 which excludes 60.

Using (30 means scores strictly greater than 30. Using 60 means scores up to and including 60.

5fill in blank

hard

Fill all three blanks to get members with scores strictly between 10 and 90, and limit the result to 5 members.

Redis

ZRANGEBYSCORE myset [1] [2] LIMIT 0 [3]

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

A(10

B90

C5

D(90

Attempts:

3 left

💡 Hint

Common Mistakes

Using 10 or 90 without parentheses includes those scores.

Not using LIMIT or wrong count value.

(10 excludes 10, (90 excludes 90, so scores strictly between 10 and 90. LIMIT 0 5 returns first 5 members.