Which products should you deploy to ensure guaranteed-once FIFO (first-in, first-out) delivery of data?

You are developing a globally scaled frontend for a legacy streaming backend data API. This API expects events in strict chronological order with no repeat data for proper processing.

Which products should you deploy to ensure guaranteed-once FIFO (first-in, first-out) delivery of data?
A . Cloud Pub/Sub alone
B . Cloud Pub/Sub to Cloud DataFlow
C . Cloud Pub/Sub to Stackdriver
D . Cloud Pub/Sub to Cloud SQL

View Answer

Answer: D

Explanation:

Reference https://cloud.google.com/pubsub/docs/ordering