[Solved] Consider this code snippet for a pull subscription client in Python using Google Cloud Pub/Sub: from google.cloud import pubsub_v1 subscriber = pubsub_v1.... | GCP

GCP - Cloud Pub/Sub

Consider this code snippet for a pull subscription client in Python using Google Cloud Pub/Sub:

from google.cloud import pubsub_v1
subscriber = pubsub_v1.SubscriberClient()
subscription_path = subscriber.subscription_path('my-project', 'my-sub')
response = subscriber.pull(subscription=subscription_path, max_messages=1)
print(len(response.received_messages))

What will this code print if there is exactly one message available in the subscription?

AError due to missing ack

B0

C1

DNone

Step-by-Step Solution

Solution:

Step 1: Understand pull method behavior
The pull method requests messages; if one message is available, it returns it in received_messages.
Step 2: Check printed output
len(response.received_messages) will be 1 because exactly one message is pulled.
Final Answer:
1 -> Option C
Quick Check:
One message pulled means length is 1 [OK]

Quick Trick: Pull returns messages list; length matches available messages [OK]

Common Mistakes:

Assuming pull returns zero without ack
Expecting error if ack is missing
Confusing pull with push subscription behavior

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Consider this code snippet for a pull subscription client in Python using Google Cloud Pub/Sub:

Step 1: Understand pull method behavior

Step 2: Check printed output

Final Answer:

Quick Check:

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