Why configuration matters in Redis - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the maximum memory limit in Redis configuration.

Redis

CONFIG SET maxmemory [1]

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

A100mb

Bmaxmemory

Ctimeout

Dappendonly

Attempts:

3 left

💡 Hint

Common Mistakes

Using a configuration name instead of a value.

Using a command name instead of a memory size.

The maxmemory setting controls the maximum memory Redis can use. Setting it to 100mb limits Redis to 100 megabytes.

2fill in blank

medium

Complete the code to enable AOF persistence in Redis.

Redis

CONFIG SET [1] yes

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

Asave

Bappendonly

Crdbcompression

Dmaxclients

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing 'save' with enabling appendonly.

Using numeric values instead of 'yes' or 'no'.

The appendonly setting enables AOF persistence, which logs every write operation. Setting it to yes turns it on.

3fill in blank

hard

Fix the error in the command to set the eviction policy to 'allkeys-lru'.

Redis

CONFIG SET maxmemory-policy [1]

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

Aallkeys-lru

Bnoeviction

Cvolatile-random

Drandom

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'noeviction' which disables eviction.

Choosing policies that only evict volatile keys.

The maxmemory-policy setting controls how Redis evicts keys when memory is full. allkeys-lru evicts the least recently used keys from all keys.

4fill in blank

hard

Fill both blanks to configure Redis to save snapshots every 60 seconds if at least 1000 keys changed.

Redis

CONFIG SET save "[1] [2]"

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

A60

B1000

C900

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the time and keys values.

Using too large or too small numbers.

The save setting defines snapshot intervals. 60 1000 means save if 1000 keys changed in 60 seconds.

5fill in blank

hard

Fill all three blanks to configure Redis to disable AOF, set max clients to 500, and set timeout to 300 seconds.

Redis

CONFIG SET appendonly [1]
CONFIG SET maxclients [2]
CONFIG SET timeout [3]

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

Ayes

B500

C300

Dno

Attempts:

3 left

💡 Hint

Common Mistakes

Setting appendonly to 'yes' instead of 'no'.

Using wrong numbers for maxclients or timeout.

Setting appendonly to no disables AOF persistence. maxclients limits client connections to 500. timeout sets idle client timeout to 300 seconds.