PK0-005 Project Life Cycle Practice Question
A project has three activities on the critical path. Activity A has a duration of 5 days, Activity B has a duration of 3 days, and Activity C has a duration of 4 days. What is the total float for any activity on the critical path?
⚠ Common exam trap
PK0-005 often tests the definitional fact that critical path float is zero, while distracting candidates with the activity durations or their sum as plausible numeric answers.
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
Total float (slack) on the critical path is always zero by definition. The critical path is the longest sequence of dependent activities through the network, and any delay to a critical-path activity directly delays the project finish date. Therefore, activities on the critical path have no scheduling flexibility.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
3 days
Why it's wrong here
Three days is Activity B's duration, not a float value; float measures scheduling slack, and critical-path activities have none. It is tempting because it is one of the stem's given numbers, and would be relevant if the question asked for the shortest activity's duration.
- ✓
0 days
Why this is correct
By definition, activities on the critical path have zero total float; any delay directly extends the project duration. The durations of 5, 3 and 4 days sum to the critical path length, and none of these activities can slip without delaying completion.
- ✗
12 days
Why it's wrong here
Twelve days is the critical path's total duration (5+3+4), not the float of its activities. It is tempting because summing the durations is the natural first calculation, and that figure would be the answer if the question asked for project duration rather than total float.
- ✗
4 days
Why it's wrong here
Four days is Activity C's duration, not a float value; float measures scheduling slack, and critical-path activities have none. It is tempting because it is one of the stem's given numbers, and would be relevant if the question asked for the longest single activity's duration.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This PK0-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PK0-005 exam.