Describe the Use of Apache Airflow DATA-ENGINEERING-OPTIMIZE Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   What is the role of the Airflow scheduler in task execution?

   • AIt decides which tasks are ready to run and sends them to the executor for processing
   • BIt stores the results of completed tasks in the metadata database
   • CIt executes the tasks directly on the scheduler machine
   • DIt provides a web interface for monitoring DAG runs
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2. 17foundation · easy

   In Apache Airflow, what does the 'Directed' part of 'Directed Acyclic Graph' mean for the tasks in a DAG?

   • ATasks can run in any order regardless of dependencies
   • BThe DAG can have cycles as long as they are clearly marked
   • CTasks are executed in parallel without any ordering
   • DDependencies between tasks have a direction, so a task can depend on another but not vice versa in the same edge
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4. 18foundation · easy

   Which Airflow component is responsible for providing the user interface to monitor and manage DAGs?

   • AExecutor
   • BScheduler
   • CWeb server
   • DMetadata database
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5. 19application · medium

   A company runs an Airflow DAG that processes data from a source that is only available on weekdays. They want the DAG to run only on weekdays at 8:00 AM. Which schedule_interval should they set?

   • A0 8 * * 1-7
   • B0 8 * * 1-5
   • C0 8 * * 0-6
   • D0 8 * * 1,3,5
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6. 20foundation · easy

   What is the primary purpose of Apache Airflow in a data engineering context?

   • ATo provide a SQL query engine for interactive data exploration
   • BTo orchestrate and schedule complex data pipelines as directed acyclic graphs (DAGs)
   • CTo provide a distributed file system for storing large volumes of data
   • DTo perform in-memory data transformations on streaming data
   Reveal Solution Discussion Select an answer first