Why tuning maximizes throughput in RabbitMQ - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the prefetch count for a RabbitMQ consumer.

RabbitMQ

channel.basic_qos(prefetch_count=[1])

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

A10

B1

C0

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 (unlimited prefetch) or negative values which do not ensure processing one message at a time.

Setting prefetch_count to 1 ensures the consumer processes one message at a time, which helps in tuning throughput by controlling load.

2fill in blank

medium

Complete the code to declare a durable queue in RabbitMQ.

RabbitMQ

channel.queue_declare(queue='task_queue', durable=[1])

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

AFalse

BNone

CTrue

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using False or None which creates non-durable queues.

Setting durable=True makes the queue survive RabbitMQ restarts, which is important for reliable throughput.

3fill in blank

hard

Fix the error in the code to acknowledge a message after processing.

RabbitMQ

channel.basic_ack(delivery_tag=[1])

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

Amethod.delivery_tag

Bdelivery_tag

Ctag

Dmessage_tag

Attempts:

3 left

💡 Hint

Common Mistakes

Using undefined variables like delivery_tag or tag directly.

The delivery_tag is accessed from the method parameter, so method.delivery_tag is correct for acknowledging messages.

4fill in blank

hard

Fill both blanks to create a message consumer with manual acknowledgments and prefetch count set.

RabbitMQ

channel.basic_qos(prefetch_count=[1])
channel.basic_consume(queue='task_queue', on_message_callback=callback, auto_ack=[2])

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

A1

BTrue

CFalse

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using auto_ack=True disables manual acknowledgments.

Setting prefetch_count=1 limits unacknowledged messages to one, and auto_ack=False requires manual acknowledgment, both improving throughput control.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that filters messages longer than 5 characters and converts keys to uppercase.

RabbitMQ

filtered = { [1]: [2] for [3], [2] in messages.items() if len([2]) > 5 }

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

Ak.upper()

Bv

Ck

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect variable names or missing the length condition.

This comprehension creates a new dictionary with keys in uppercase and values filtered by length greater than 5.