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Exam Certified Data Engineer Professional topic 1 question 89 discussion

Actual exam question from Databricks's Certified Data Engineer Professional
Question #: 89
Topic #: 1
[All Certified Data Engineer Professional Questions]

A Databricks job has been configured with 3 tasks, each of which is a Databricks notebook. Task A does not depend on other tasks. Tasks B and C run in parallel, with each having a serial dependency on Task A.

If task A fails during a scheduled run, which statement describes the results of this run?

  • A. Because all tasks are managed as a dependency graph, no changes will be committed to the Lakehouse until all tasks have successfully been completed.
  • B. Tasks B and C will attempt to run as configured; any changes made in task A will be rolled back due to task failure.
  • C. Unless all tasks complete successfully, no changes will be committed to the Lakehouse; because task A failed, all commits will be rolled back automatically.
  • D. Tasks B and C will be skipped; some logic expressed in task A may have been committed before task failure.
  • E. Tasks B and C will be skipped; task A will not commit any changes because of stage failure.
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Suggested Answer: D 🗳️
by sturcu at Oct. 25, 2023, 8:35 a.m.

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mouad_attaqi
Highly Voted 3 months, 2 weeks ago
Selected Answer: D
D is correct, taks B and C will definitely be skipped, since Task A is notebook, the ACID logic is at cell level, some logic might be executed before failing cell
upvoted 6 times
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aragorn_brego
Most Recent 2 months, 3 weeks ago
Selected Answer: D
In Databricks job execution, if a task that other tasks depend on fails, the dependent tasks will not be executed. Since Tasks B and C depend on the successful completion of Task A, they will be skipped if Task A fails. However, if Task A performs any operations that commit changes before the failure occurs (such as writing to a Delta table), those changes remain and are not automatically rolled back unless the logic within Task A specifically includes rollback mechanisms for partial failures.
upvoted 4 times
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Dileepvikram
3 months ago
D is the answer
upvoted 3 times
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sturcu
3 months, 2 weeks ago
Selected Answer: D
Some ops in task A may have fished before fail
upvoted 3 times
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