Why exchanges route messages to queues in RabbitMQ - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a topic exchange named 'logs'.

RabbitMQ

channel.exchange_declare(exchange='[1]', exchange_type='topic')

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

Amessages

Bqueue

Clogs

Ddirect

Attempts:

3 left

💡 Hint

Common Mistakes

Using exchange type instead of exchange name

Using queue name instead of exchange name

The exchange name is 'logs' as declared in the code.

2fill in blank

medium

Complete the code to bind the queue 'error_logs' to the exchange 'logs' with routing key 'error'.

RabbitMQ

channel.queue_bind(queue='error_logs', exchange='logs', routing_key='[1]')

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Ainfo

Bwarning

Cdebug

Derror

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong routing key like 'info' or 'debug'

The routing key 'error' binds the queue to receive error messages.

3fill in blank

hard

Fix the error in the code to publish a message with routing key 'info' to the exchange 'logs'.

RabbitMQ

channel.basic_publish(exchange='logs', routing_key='[1]', body='System started')

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Ainfo

Berror

Cwarning

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using routing key that does not match queue bindings

The routing key must match the intended message type, here 'info'.

4fill in blank

hard

Fill both blanks to create a binding where the queue 'all_logs' receives all messages regardless of routing key.

RabbitMQ

channel.queue_bind(queue='all_logs', exchange='logs', routing_key='[1]')
channel.basic_publish(exchange='logs', routing_key='[2]', body='Test message')

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B*

C#

Dall

Attempts:

3 left

💡 Hint

Common Mistakes

Using '*' which matches only one word

Using empty string which matches no keys

The routing key '#' matches all routing keys, so the queue receives all messages.

5fill in blank

hard

Fill all three blanks to create a topic exchange 'topic_logs', bind queue 'kern_logs' to routing key 'kern.*', and publish a message with routing key 'kern.critical'.

RabbitMQ

channel.exchange_declare(exchange='[1]', exchange_type='topic')
channel.queue_bind(queue='kern_logs', exchange='topic_logs', routing_key='[2]')
channel.basic_publish(exchange='topic_logs', routing_key='[3]', body='Kernel critical error')

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

Atopic_logs

Bkern.*

Ckern.critical

Ddirect_logs

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong exchange name

Using incorrect routing key patterns

The exchange is 'topic_logs' of type 'topic'. The queue binds to 'kern.*' to receive all kernel messages. The message is published with routing key 'kern.critical'.