INCRBY and DECRBY in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to increase the value of the key 'counter' by 5.

Redis

INCRBY counter [1]

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

A5

B10

C-5

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using a negative number with INCRBY to increase the value.

Forgetting to specify the increment value.

The INCRBY command increases the integer value of a key by the given amount. Here, we increase 'counter' by 5.

2fill in blank

medium

Complete the code to decrease the value of the key 'score' by 3.

Redis

DECRBY score [1]

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

A3

B5

C-3

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using a negative number with DECRBY to decrease the value.

Confusing DECRBY with INCRBY.

The DECRBY command decreases the integer value of a key by the given amount. Here, we decrease 'score' by 3.

3fill in blank

hard

Fix the error in the code to correctly increase the key 'visits' by 7.

Redis

INCRBY visits [1]

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

A-7

Bseven

C7

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using a word instead of a number for the increment.

Using a negative number with INCRBY.

The increment value must be a positive integer. Using a string or negative number causes an error.

4fill in blank

hard

Fill both blanks to decrease the key 'balance' by 15 and increase the key 'debt' by 15.

Redis

DECRBY balance [1]
INCRBY debt [2]

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

A15

B10

C5

D20

Attempts:

3 left

💡 Hint

Common Mistakes

Using different amounts for the two commands.

Using negative numbers with DECRBY or INCRBY incorrectly.

Both commands use the same amount 15 to adjust the keys correctly.

5fill in blank

hard

Fill all three blanks to increase 'likes' by 8, decrease 'dislikes' by 3, and increase 'comments' by 5.

Redis

INCRBY likes [1]
DECRBY dislikes [2]
INCRBY comments [3]

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

A3

B8

C5

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the amounts for each key.

Using negative numbers with DECRBY or INCRBY incorrectly.

Use 8 to increase 'likes', 3 to decrease 'dislikes', and 5 to increase 'comments'.