Practice Test 4 | Google Cloud Certified Professional Data Engineer | Dumps | Mock Test
Below are some statements regarding pub/sub delivery mechanism. Select the correct ones.
A. Pull based delivery is preferred when there is a large volume of messages.
B. Push based delivery is preferred when efficiency and throughput of message processing is critical.
C. In pull based delivery multiple subscriber can make pull calls to the same “shared” subscription.
D. Push based allows for batched delivery, therefore higher throughput can be achieved at low CPU.
Option A, C are correct.
Option A is correct. Pull based delivery is faster than push based delivery. Also, pull based can handle large volume of messages (more than 1/second).
Option B is incorrect. Pull based delivery is preferred if efficiency and throughput of message processing is required. Subscriber can call the pub/sub server for the message and pub/sub server respond with the message and ackId. In Push based delivery one message per request is sent.
Option C is correct. Multiple consumers/subscribers can subscribe and can make calls simultaneously in pull based model.
Option D is incorrect. One message per request is delivered in push based delivery. Batch delivery can be done in pull based model.
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