Cloud Functions with Pub/Sub triggers in GCP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the trigger type for a Cloud Function.

GCP

gcloud functions deploy myFunction --gen2 --trigger-[1] my-topic --runtime python312

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

Ahttp

Beventarc

Cpubsub

Dstorage

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'http' instead of 'pubsub' for Pub/Sub triggers.

Confusing storage triggers with Pub/Sub triggers.

The --trigger-pubsub flag sets the function to trigger on Pub/Sub messages.

2fill in blank

medium

Complete the code to specify the Pub/Sub topic name for the trigger.

GCP

gcloud functions deploy myFunction --gen2 --trigger-pubsub [1] --runtime python312

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Aprojects/my-project/topics/my-topic

Bmy-topic

Cprojects/my-project/my-topic

Dtopics/my-topic

Attempts:

3 left

💡 Hint

Common Mistakes

Using only the topic name without the full path.

Omitting the 'topics' part in the path.

The full resource name projects/my-project/topics/my-topic specifies the Pub/Sub topic.

3fill in blank

hard

Fix the error in the function code to correctly decode the Pub/Sub message data.

GCP

def my_function(event, context):
    import base64
    message = base64.b64decode(event['message']['[1]']).decode('utf-8')
    print(f"Received message: {message}")

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

Amessage

Battributes

Cpayload

Ddata

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'message' or 'payload' instead of 'data'.

Trying to decode a non-existent key.

The Pub/Sub message data is in the event['message']['data'] field of the event.

4fill in blank

hard

Fill both blanks to create a Cloud Function that logs the message ID and publish time.

GCP

def my_function(event, context):
    message_id = event['message']['[1]']
    publish_time = event['message']['[2]']
    print(f"Message ID: {message_id}, Published at: {publish_time}")

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

Aevent_id

Btimestamp

CpublishTime

DmessageId

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'event_id' instead of 'messageId'.

Using 'timestamp' instead of 'publishTime'.

The message ID is accessed with event['message']['messageId'] and the publish time with event['message']['publishTime'].

5fill in blank

hard

Fill all three blanks to deploy a Cloud Function with a Pub/Sub trigger, specifying the runtime and entry point.

GCP

gcloud functions deploy [1] --gen2 --runtime [2] --trigger-pubsub [3] --entry-point my_function

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

AmyFunction

Bpython312

Cprojects/my-project/topics/my-topic

Dnodejs20

Attempts:

3 left

💡 Hint

Common Mistakes

Using a runtime that does not match the language.

Omitting the full topic path.

The function name is myFunction, the runtime is python312, and the Pub/Sub topic is specified with the full path.