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PROFESSIONAL-DATA-ENGINEER · Question #338

PROFESSIONAL-DATA-ENGINEER Question #338: Real Exam Question with Answer & Explanation

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

Question

You are deploying an Apache Airflow directed acyclic graph (DAG) in a Cloud Composer 2 instance. You have incoming files in a Cloud Storage bucket that the DAG processes, one file at a time. The Cloud Composer instance is deployed in a subnetwork with no Internet access. Instead of running the DAG based on a schedule, you want to run the DAG in a reactive way every time a new file is received. What should you do?

Options

  • A1. Enable Private Google Access in the subnetwork, and set up Cloud Storage notifications to a Pub/Sub topic.
  • B1. Enable the Cloud Composer API, and set up Cloud Storage notifications to trigger a Cloud Function.
  • C1. Enable the Airflow REST API, and set up Cloud Storage notifications to trigger a Cloud Function instance.
  • D1. Enable the Airflow REST API, and set up Cloud Storage notifications to trigger a Cloud Function instance.

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Topics

#Cloud Composer#Event-driven Architecture#Cloud Functions#Airflow REST API
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