PK0-004 · Question #332
A project has activities on the critical path that must be completed before other activities can start: Task A is dependent on Task C before Task D can be completed. Task A requires Task B to start…
The correct answer is D. B, C, A, D. This question requires sequencing tasks on a critical path by satisfying all stated predecessor relationships. The correct order must place both B and C before A, and A before D.
Question
A project has activities on the critical path that must be completed before other activities can start:
Task A is dependent on Task C before Task D can be completed. Task A requires Task B to start. Task B takes twice as long to complete as Task C. Which of the following is the appropriate ordering of the critical path?
Options
- AB, A, D
- BC, B, D, A
- CD, A, C
- DB, C, A, D
How the community answered
(40 responses)- A5% (2)
- B33% (13)
- C13% (5)
- D50% (20)
Why each option
This question requires sequencing tasks on a critical path by satisfying all stated predecessor relationships. The correct order must place both B and C before A, and A before D.
B, A, D omits Task C entirely, violating the dependency that C must precede A before D can be completed.
C, B, D, A places D before A, directly violating the rule that A must complete before D can be completed.
D, A, C places D first and C last, violating both the C-before-A and the A-before-D dependencies simultaneously.
B, C, A, D satisfies every stated dependency. Task A requires Task B to start, so B precedes A. Task A is dependent on Task C before Task D can be completed, meaning C must also precede A, and A must precede D. Placing B and C first, then A, then D honors all constraints.
Concept tested: Critical path task dependency sequencing
Source: https://www.pmi.org/pmbok-guide-standards/foundational/pmbok
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