Queue TTL and auto-expiry in RabbitMQ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a queue with a message TTL of 60000 milliseconds.

RabbitMQ

rabbitmqctl set_policy TTL "^myqueue$" '{"message-ttl": [1]' --apply-to queues

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

A60000

B6000

C600000

D60

Attempts:

3 left

💡 Hint

Common Mistakes

Using seconds instead of milliseconds

Setting TTL too low or too high by mistake

The message-ttl value is in milliseconds. 60000 means messages expire after 60 seconds.

2fill in blank

medium

Complete the code to declare a queue with auto-expiry of 300000 milliseconds using rabbitmqadmin.

RabbitMQ

rabbitmqadmin declare queue name=myqueue durable=true arguments='{"x-expires": [1]'

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

A300

B30000

C3000

D300000

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing message TTL with queue expiry

Using seconds instead of milliseconds

The x-expires argument sets the queue auto-expiry time in milliseconds. 300000 means 5 minutes.

3fill in blank

hard

Fix the error in the policy command to set queue TTL to 120000 milliseconds.

RabbitMQ

rabbitmqctl set_policy TTL "^myqueue$" '{"message-ttl": [1]' --apply-to queues

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

A120000

B1200

C12000

D"120000"

Attempts:

3 left

💡 Hint

Common Mistakes

Putting TTL value in quotes causing syntax error

Using wrong TTL value

The TTL value must be a number, not a string. So 120000 without quotes is correct.

4fill in blank

hard

Fill both blanks to declare a queue with message TTL and auto-expiry set.

RabbitMQ

rabbitmqadmin declare queue name=myqueue durable=true arguments='{"x-message-ttl": [1], "x-expires": [2]'

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

A60000

B120000

C180000

D300000

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up TTL and expiry values

Using same value for both TTL and expiry

Message TTL is set to 60000 ms (1 minute), and queue auto-expiry is set to 300000 ms (5 minutes).

5fill in blank

hard

Fill all three blanks to set a policy that applies TTL and auto-expiry to queues starting with 'task_'.

RabbitMQ

rabbitmqctl set_policy taskTTL "^task_.*" '{"message-ttl": [1], "expires": [2], "auto-delete": [3]' --apply-to queues

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

A60000

B180000

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using string 'true' instead of boolean true

Confusing expires with message-ttl

The policy sets message TTL to 60000 ms, queue expires after 180000 ms, and auto-delete is enabled (true).