If a Cloud Function is deployed with a Pub/Sub trigger, what happens when a message is published to the topic?

medium📝 Predict Output Q5 of 15

GCP - Cloud Functions

AThe message is deleted without processing

BThe message is stored but function is not triggered

CThe function runs only on HTTP requests

DThe Cloud Function is invoked with the message data

Step-by-Step Solution

Solution:

Step 1: Understand Pub/Sub trigger behavior
When a message is published to a Pub/Sub topic, any Cloud Function subscribed to that topic is triggered with the message.
Step 2: Evaluate options
Only The Cloud Function is invoked with the message data correctly describes this behavior. Others describe incorrect or unrelated outcomes.
Final Answer:
The Cloud Function is invoked with the message data -> Option D
Quick Check:
Pub/Sub trigger invokes function on message publish [OK]

Quick Trick: Pub/Sub messages trigger subscribed Cloud Functions [OK]

Common Mistakes:

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