BigData / Apache Airflow Interview Questions
What is an Airflow Variable?
Variables are key-value pairs stored in Airflow's metadata database. They provide a way to pass configuration or runtime values into DAGs without hardcoding them. Variables can be set via the UI, CLI, environment variables, or the Python API.
from airflow.models import Variable # Read a variable (with default fallback) env = Variable.get('environment', default_var='production') # Serialize JSON config = Variable.get('pipeline_config', deserialize_json=True)
For sensitive values, prefer Connections or a secrets backend over plain Variables, since Variable values are stored unencrypted by default.
Are Airflow Variables encrypted by default?
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