Transaction mode vs confirms in RabbitMQ - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a transaction in RabbitMQ channel.

RabbitMQ

channel.[1]()

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

Acommit

Btx_select

Cbasic_publish

Dconfirm_select

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'commit' to start transaction instead of 'tx_select'.

Confusing confirms with transactions.

The tx_select() method starts a transaction mode on the channel.

2fill in blank

medium

Complete the code to enable publisher confirms on the channel.

RabbitMQ

channel.[1]()

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

Aconfirm_select

Btx_select

Ctx_commit

Dbasic_ack

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'tx_select' instead of 'confirm_select'.

Trying to commit before enabling confirms.

The confirm_select() method enables publisher confirms mode on the channel.

3fill in blank

hard

Fix the error in the code to commit a transaction.

RabbitMQ

channel.[1]()

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

Atx_select

Bconfirm_select

Ctx_commit

Dbasic_publish

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'tx_select' to commit instead of 'tx_commit'.

Using 'confirm_select' to commit transactions.

The tx_commit() method commits the current transaction.

4fill in blank

hard

Fill both blanks to publish a message and wait for confirms.

RabbitMQ

channel.basic_publish(exchange='', routing_key='task_queue', body='Hello')
channel.[1]()
channel.[2]()

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

Await_for_confirms

Btx_commit

Ctx_select

Dconfirm_select

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'confirm_select' instead of 'wait_for_confirms'.

Mixing transaction start and commit methods.

After publishing, wait_for_confirms() waits for confirms, and tx_select() starts a transaction if used. However, typically for confirms, you enable confirms with confirm_select() before publishing and then call wait_for_confirms() after publishing.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension filtering messages with length greater than 5 and publishing them with confirms.

RabbitMQ

messages = {'msg1': 'Hello', 'msg2': 'Welcome', 'msg3': 'Hi there'}
filtered = {k: v for k, v in messages.items() if len(v) [1] 5}
channel.[2]()
for key, msg in filtered.items():
    channel.basic_publish(exchange='', routing_key='queue', body=msg)
channel.[3]()

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

A>

Bconfirm_select

Cwait_for_confirms

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' in filter.

Not enabling confirms before publishing.

Not waiting for confirms after publishing.

The comprehension filters messages with length greater than 5 using '>'. Then confirm_select() enables confirms, and wait_for_confirms() waits for them after publishing.