DP-700 Question #123: Real Exam Question with Answer & Explanation

Question

You need to modify the DAG definition to meet the following requirements: - Ensure that notebook_01 and notebook_02 run in parallel. - Ensure that notebook_03 only runs after the execution of notebook_01 and notebook_02 is complete. How should you modify the DAG definition?

Options

• ACreate a second DAG definition. Move notebook_03 and notebook_02 to the new DAG definition.
• BMove the notebook_03 declaration to the top of the DAG definition. Add a concurrency to notebook_02 and notebook_01.
• CCreate two stages in the DAG definition. Add notebook_03 to the first stage. Add notebook_01 and notebook_02 to the second stage.
• DPlace the declaration of notebook_03 to the top of the DAG definition. Add a new stage that contains notebook_01 and notebook_02.

Explanation

The question asks how to define dependencies in a DAG (Directed Acyclic Graph) to make two notebooks run in parallel and a third run only after both complete.

Common mistakes.

• A. Creating a second DAG definition would result in two independent execution flows and would not ensure the required sequential dependency between all three notebooks.
• B. Merely moving a declaration to the top or adding a 'concurrency' parameter does not define the explicit parallel-then-sequential dependency required by the problem; dependencies dictate execution order, not declaration order.
• D. Placing a declaration at the top and creating a new stage without explicit dependency definitions does not ensure the required parallel and sequential execution order.

Concept tested. DAG task orchestration, parallel and sequential execution

Reference. https://learn.microsoft.com/fabric/data-factory/create-pipelines

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