Batch publishing for throughput in RabbitMQ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a queue named 'task_queue' in RabbitMQ.

RabbitMQ

channel.queue_declare(queue=[1])

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

A'task_queue'

Btask_queue

C'queue_task'

Dqueue_task

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the queue name

Using incorrect queue name

The queue name must be a string, so it needs quotes around it.

2fill in blank

medium

Complete the code to publish a message 'Hello' to the 'task_queue'.

RabbitMQ

channel.basic_publish(exchange='', routing_key=[1], body='Hello')

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

A'queue_task'

Btask_queue

C'hello'

D'task_queue'

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong queue name

Omitting quotes around routing_key

The routing_key must match the queue name as a string to send the message correctly.

3fill in blank

hard

Fix the error in the batch publishing code by completing the blank.

RabbitMQ

channel.confirm_select()
for message in messages:
    channel.basic_publish(exchange='', routing_key='task_queue', body=message)
channel.[1]()

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

Await_for_confirms

Bwait_for_ack

Cwait_for_confirms_or_die

Dwait

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent method names

Not waiting for confirms after publishing

wait_for_confirms_or_die() waits for all messages to be confirmed or raises an error if any fail.

4fill in blank

hard

Fill both blanks to create a batch publish loop that confirms messages.

RabbitMQ

channel.[1]()
for msg in batch:
    channel.basic_publish(exchange='', routing_key='task_queue', body=msg)
channel.[2]()

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

Aconfirm_select

Bbasic_publish

Cwait_for_confirms_or_die

Dqueue_declare

Attempts:

3 left

💡 Hint

Common Mistakes

Not enabling confirm mode

Not waiting for confirms after publishing

confirm_select() enables confirm mode; wait_for_confirms_or_die() waits for all confirms after publishing.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that batches messages by length greater than 5.

RabbitMQ

batched = {msg[1]2: msg for msg in messages if len(msg) [2] 5 and msg [3] 'error'}

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

A**

B>

C!=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong operators

Confusing equality and inequality

We square the message (symbolically), filter messages longer than 5, and exclude those equal to 'error'.