Pull vs push subscriptions in GCP - Quick Revision & Key Differences

Recall & Review

beginner

What is a pull subscription in Google Cloud Pub/Sub?

A pull subscription is where the subscriber application requests messages from the Pub/Sub service when it is ready to process them.

beginner

What is a push subscription in Google Cloud Pub/Sub?

A push subscription automatically sends messages to a subscriber's endpoint (like a web server) as soon as they arrive.

intermediate

Which subscription type requires the subscriber to manage message pulling timing?

Pull subscriptions require the subscriber to control when and how often it pulls messages from the service.

intermediate

What is a key advantage of push subscriptions?

Push subscriptions reduce latency because messages are sent immediately to the subscriber without waiting for a pull request.

intermediate

Name one challenge of using push subscriptions.

The subscriber endpoint must be publicly reachable and able to handle incoming HTTPS requests reliably.

In a pull subscription, who decides when to receive messages?

A The subscriber application

B The Pub/Sub service

C Google Cloud automatically

D The message publisher

In pull subscriptions, the subscriber application requests messages when it is ready.

Which subscription type sends messages automatically to a subscriber endpoint?

A Pull subscription

B Push subscription

C Both pull and push

D Neither pull nor push

Push subscriptions send messages automatically to the subscriber's endpoint.

What must a subscriber have to use push subscriptions?

A A publicly accessible HTTPS endpoint

B A private database

C A pull request scheduler

D A message queue

Push subscriptions require a publicly accessible HTTPS endpoint to receive messages.

Which subscription type can help reduce message delivery latency?

A Pull subscription

B Neither

C Push subscription

D Both equally

Push subscriptions send messages immediately, reducing latency.

If a subscriber wants to control when to process messages, which subscription should they use?

A Push subscription

B None

C Both push and pull

D Pull subscription

Pull subscriptions let the subscriber control message retrieval timing.

Explain the difference between pull and push subscriptions in Google Cloud Pub/Sub.

Think about who initiates message delivery.

What are the advantages and challenges of using push subscriptions?

Consider message delivery speed and subscriber setup.