Databricks Certified Data Engineer - Associate
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A data engineer has a single-task Job that runs each morning before they begin working. After identifying an upstream data issue, they need to set up another task to run a new notebook prior to the original task.
Which approach can the data engineer use to set up the new task?
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KKeng
A
They can clone the existing task in the existing Job and update it to run the new notebook.
B
They can create a new task in the existing Job and then add it as a dependency of the original task.
C
They can create a new task in the existing Job and then add the original task as a dependency of the new task.
D
They can create a new job from scratch and add both tasks to run concurrently.
Explanation:
Explanation
Correct Answer: B
Why Option B is correct:
- The requirement is to run a new notebook prior to the original task
- In Databricks Jobs, task dependencies define execution order - when Task A depends on Task B, Task B must complete successfully before Task A can start
- By creating a new task and adding it as a dependency of the original task, the new task will run first, then the original task
Why other options are incorrect:
- Option A: Cloning and updating the existing task would replace the original task rather than adding a new task to run before it
- Option C: This would make the original task a dependency of the new task, meaning the original task would run first (opposite of what's needed)
- Option D: Creating a new job from scratch is unnecessary and would require additional setup; it's more efficient to modify the existing job
Key Concept: In Databricks Jobs, task dependencies control execution order. To run Task A before Task B, make Task A a dependency of Task B.
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