PUBLISH to channels in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to publish the message 'Hello' to the channel 'news'.

Redis

PUBLISH [1] Hello

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

Achannel

Bmessage

Cnews

Dhello

Attempts:

3 left

💡 Hint

Common Mistakes

Using the message text as the channel name.

Confusing the channel name with the command.

The PUBLISH command sends a message to a specified channel. Here, the channel name is 'news'.

2fill in blank

medium

Complete the code to publish the message 'Update' to the channel named 'alerts'.

Redis

PUBLISH [1] Update

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

Aupdates

Bnews

Cmessages

Dalerts

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong channel name like 'news' or 'updates'.

Mixing up the message and channel parameters.

The PUBLISH command sends the message 'Update' to the 'alerts' channel.

3fill in blank

hard

Fix the error in the code to correctly publish 'Alert!' to the 'system' channel.

Redis

PUBLISH system [1]

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

A'Alert!'

BAlert

CAlert!

D"Alert!"

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the message causing syntax errors.

Using double quotes which may not be accepted in some shells.

In Redis CLI, strings with special characters or spaces should be quoted. Here, 'Alert!' needs single quotes.

4fill in blank

hard

Fill both blanks to publish the message 'Server down' to the 'status' channel.

Redis

PUBLISH [1] [2]

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

Astatus

B'Server down'

CServer down

Dserver

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted message text with spaces.

Using wrong channel names.

The channel name is 'status' and the message must be quoted as 'Server down' to be valid.

5fill in blank

hard

Fill both blanks to publish the message 'Error 404' to the 'logs' channel using the Redis CLI.

Redis

PUBLISH [1] [2]

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

Alogs

B'Error 404'

CError 404

Derrors

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the message with spaces.

Using incorrect channel names.

The channel is 'logs' and the message must be quoted as 'Error 404' to handle the space correctly.