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PROFESSIONAL-DATA-ENGINEER · Question #376

PROFESSIONAL-DATA-ENGINEER Question #376: Real Exam Question with Answer & Explanation

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Submitted by mike_84· Mar 30, 2026Designing data processing systems

Question

You work for a large ecommerce company. You are using Pub/Sub to ingest the clickstream data to Google Cloud for analytics. You observe that when a new subscriber connects to an existing topic to analyze data, they are unable to subscribe to older data. For an upcoming yearly sale event in two months, you need a solution that, once implemented, will enable any new subscriber to read the last 30 days of data. What should you do?

Options

  • ACreate a new topic, and publish the last 30 days of data each time a new subscriber connects to an existing topic.
  • BSet the topic retention policy to 30 days.
  • CSet the subscriber retention policy to 30 days.
  • DAsk the source system to re-push the data to Pub/Sub, and subscribe to it.

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Topics

#Pub/Sub#Message Retention Policy#Data Ingestion
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