CAPM Practice Question: Project Management Fundamentals and Core Concepts
Exhibit
Activity | Duration | Predecessors A | 5 | none B | 3 | A (FS) C | 4 | A (FS) D | 6 | B, C (FS) E | 2 | D (FS) F | 3 | C (FS) G | 4 | E, F (FS)
Refer to the exhibit. What is the total float of activity C?
⚠ Common exam trap
Test-takers frequently confuse total float with free float or miscalculate the critical path by not correctly summing durations, leading them to assign positive float to an activity that is actually on the critical path.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
0 days
Activity C has a total float of 0 days because it lies on the critical path. In the network diagram, the critical path is the longest path through the project, and any delay on a critical path activity directly delays the project end date. Since activity C is on the critical path, its total float is zero.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
2 days
Why it's wrong here
This would be the float if C were not on the critical path, but it is.
- ✓
0 days
Why this is correct
Activity C is on the critical path (A-C-D-E-G = 21 days), thus it has zero float.
- ✗
3 days
Why it's wrong here
This is not supported by the network diagram calculations.
- ✗
1 day
Why it's wrong here
Activity C is on the critical path, so its float is 0, not 1.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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