BigData / Apache Airflow Interview Questions
What is the Airflow Web UI and what can you do with it?
The Airflow Web UI (powered by Flask and the FAB — Flask-AppBuilder security framework) is a browser-based dashboard for managing and monitoring pipelines. Key features include:
- DAG list view — see all DAGs, toggle pause/unpause, check recent run states.
- Graph view — visualize task dependencies and task-level states for a specific run.
- Gantt view — examine task duration and parallelism within a DAG Run.
- Task logs — read stdout/stderr output for any task instance.
- Trigger DAGs — manually trigger a DAG Run with optional config JSON.
- Clear tasks — reset failed or successful tasks for re-execution.
- Admin — manage Connections, Variables, Pools, and user accounts.
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