Why Composer: Managed Airflow on GCP—no cluster ops; integrated with BigQuery, GCS, Pub/Sub. Architectural logic: Creates Airflow environment; DAGs via GCS bucket; automatic upgrades. Supports Airflow 2.x, Celery/K8s executors. When to use: GCP-native pipelines; teams wanting orchestration without ops. Scalability: Auto-scaling workers; environment size configurable. Trade-offs: Cost can add up; less control than self-hosted. Cost: Environment size (CPU, memory) + worker costs....
The complete answer continues with detailed implementation patterns, architectural trade-offs, and production-grade considerations. It covers performance optimization strategies, common pitfalls to avoid, and real-world examples from companies like Verizon. The answer also includes follow-up discussion points that interviewers commonly explore.
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