Dead letter topics in GCP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a Pub/Sub subscription with a dead letter topic.

GCP

subscription = pubsub_v1.Subscription(client, project_path, subscription_name, dead_letter_topic=[1])

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A"projects/my-project/topics/backup-topic"

B"projects/my-project/topics/main-topic"

C"projects/my-project/subscriptions/dead-letter-subscription"

D"projects/my-project/topics/dead-letter-topic"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a subscription name instead of a topic name for dead letter topic.

Using the main topic as dead letter topic.

The dead letter topic must be a Pub/Sub topic, specified by its full resource name.

2fill in blank

medium

Complete the code to set the maximum delivery attempts for a dead letter policy.

GCP

dead_letter_policy = pubsub_v1.types.DeadLetterPolicy(max_delivery_attempts=[1])

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A0

B100

C5

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting max_delivery_attempts to zero disables dead letter handling.

Using negative numbers causes errors.

The max_delivery_attempts must be a positive integer. 5 is a common default.

3fill in blank

hard

Fix the error in the dead letter policy assignment by completing the code.

GCP

subscription.dead_letter_policy = [1]

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ADeadLetterPolicy()

Bdead_letter_policy

Cpubsub_v1.types.DeadLetterPolicy()

Dpubsub_v1.DeadLetterPolicy()

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to create a new DeadLetterPolicy without parameters.

Using incorrect module paths.

You must assign the previously created dead_letter_policy object to the subscription.

4fill in blank

hard

Fill both blanks to configure a subscription with a dead letter topic and max delivery attempts.

GCP

subscription = pubsub_v1.Subscription(client, project_path, subscription_name, dead_letter_policy=pubsub_v1.types.DeadLetterPolicy(dead_letter_topic=[1], max_delivery_attempts=[2]))

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A"projects/my-project/topics/dead-letter-topic"

B10

C5

D"projects/my-project/topics/main-topic"

Attempts:

3 left

💡 Hint

Common Mistakes

Using the main topic as dead letter topic.

Setting max delivery attempts to zero or negative.

The dead letter topic must be the dead letter topic resource name, and max delivery attempts a positive integer like 5.

5fill in blank

hard

Fill all three blanks to create a subscription with dead letter policy and acknowledge deadline.

GCP

subscription = pubsub_v1.Subscription(client, project_path, subscription_name, dead_letter_policy=pubsub_v1.types.DeadLetterPolicy(dead_letter_topic=[1], max_delivery_attempts=[2]), ack_deadline_seconds=[3])

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A"projects/my-project/topics/dead-letter-topic"

B10

C20

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing ack_deadline_seconds with max_delivery_attempts.

Using invalid resource names.

Dead letter topic is the topic resource name, max delivery attempts is 5, and ack deadline is 20 seconds.