INCR and DECR for counters in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to increase the value of the counter by 1.

Redis

INCR [1]

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

Acounter

Bdecr

Cset

Dget

Attempts:

3 left

💡 Hint

Common Mistakes

Using the command name as the key.

Using commands like SET or GET instead of the key name.

The INCR command increases the value stored at the given key by 1. Here, the key is counter.

2fill in blank

medium

Complete the code to decrease the value of the counter by 1.

Redis

DECR [1]

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

Avalue

Bnumber

Ccounter

Dincrease

Attempts:

3 left

💡 Hint

Common Mistakes

Using a command name instead of the key.

Using a wrong key name that does not exist.

The DECR command decreases the value stored at the given key by 1. The key here is counter.

3fill in blank

hard

Fix the error in the code to correctly increase the counter.

Redis

INCR [1]

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

Aincr

Bcounter_value

Cdecr

Dcounter

Attempts:

3 left

💡 Hint

Common Mistakes

Using command names like INCR or DECR as the key.

Using a different key name than the one initialized.

The key name must be counter to correctly increase the counter. Using counter_value or command names causes errors.

4fill in blank

hard

Fill both blanks to increase and then decrease the counter.

Redis

INCR [1]
DECR [2]

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

Acounter

Bvalue

Ccount

Dnumber

Attempts:

3 left

💡 Hint

Common Mistakes

Using different key names for INCR and DECR.

Using keys that do not exist.

Both commands must use the same key counter to modify the same counter value.

5fill in blank

hard

Fill all three blanks to set a counter, increase it, and then get its value.

Redis

SET [1] 10
INCR [2]
GET [3]

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

Acounter

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using different key names in SET, INCR, and GET.

Using a key name that was not set.

All commands must use the same key counter to set, increase, and get the counter value.