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Which GCP service is the canonical serverless messaging bus for ingesting streaming events at scale — at-least-once delivery, decoupled subscribers — referenced throughout PDE §2.2?
ACloud DNS
BCloud Filestore
CCloud Pub/Sub
DCloud Memorystore
Answer & Solution
Correct answer: C. Cloud Pub/Sub
Pub/Sub is GCP's serverless event bus (per PDE §2.2). The others aren't streaming buses.
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