RPC vs direct API calls in RabbitMQ - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to send a message to the queue named 'task_queue'.

RabbitMQ

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

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

Atask_queue

Brpc_queue

Capi_queue

Dresponse_queue

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong queue name in routing_key

Confusing exchange with routing_key

The routing_key specifies the queue name. Here, 'task_queue' is the correct queue to send the message.

2fill in blank

medium

Complete the code to declare a queue for RPC server to listen on.

RabbitMQ

channel.queue_declare(queue='[1]')

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

Atask_queue

Brpc_queue

Capi_queue

Dcallback_queue

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'task_queue' instead of 'rpc_queue'

Confusing callback queue with server queue

The RPC server listens on 'rpc_queue' to receive requests.

3fill in blank

hard

Fix the error in the code to send an RPC request with a unique correlation id.

RabbitMQ

channel.basic_publish(exchange='', routing_key='rpc_queue', properties=pika.BasicProperties(correlation_id=[1]), body='Request')

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

A'corr_id_1'

B'12345'

C12345

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Using an integer instead of a string for correlation_id

Passing None as correlation_id

The correlation_id must be a string. Using quotes around the id is required.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that filters messages with a correlation id matching the request.

RabbitMQ

responses = {k: v for k, v in messages.items() if k [1] request_id and v [2] 'done'}

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

A==

B!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' instead of '=='

Mixing operators incorrectly

The comprehension selects items where the key equals the request_id and the value does not equal 'done'.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps request IDs to their responses if the response status is 'success'.

RabbitMQ

result = [1]: [2] for [3] in responses.items() if v == 'success'

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

Areq_id

Bresp

Creq_id, v

Dv

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing key and value names

Incorrect unpacking of items

Using wrong variable names

The comprehension maps each request ID (req_id) to its response (v) from the items (req_id, v) where the response status is 'success'.