Quick Answer
The correct answer is that the critical path has the longest duration and zero float. This is true because the critical path represents the sequence of tasks that determines the shortest possible project completion time; any delay on a critical path activity directly extends the project’s finish date, hence it has zero float or total slack. On the CompTIA Project+ PK0-005 exam, this concept tests your understanding of network diagrams and schedule constraints—often appearing in questions that ask you to identify which path controls the project timeline. A common trap is confusing the critical path with the path having the most activities; instead, remember it is always the path with the greatest total duration and no schedule flexibility. To lock it in, use the memory tip: “Zero float means zero room for delay—if it’s late, the project is late.”
This PK0-005 practice question tests your understanding of project management concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A project manager needs to determine the critical path of a project. Which statement about the critical path is true?
It has the shortest duration in the network.
Why wrong: It's the longest.
It has the longest duration and zero float.
Definition of critical path.
There is always exactly one critical path.
Why wrong: Can have multiple.
It cannot change during the project.
Why wrong: Can change due to delays.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
It has the longest duration and zero float.
The critical path is the longest path through the project network diagram, determining the shortest possible project duration. It has zero float (or total slack), meaning any delay on a critical path activity directly delays the project. Option B correctly captures both the longest duration and zero float characteristics.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
It has the shortest duration in the network.
Why it's wrong here
It's the longest.
It has the longest duration and zero float.
Why this is correct
Definition of critical path.
Related concept
Read the scenario before looking for a memorised answer.
There is always exactly one critical path.
Why it's wrong here
Can have multiple.
It cannot change during the project.
Why it's wrong here
Can change due to delays.
Common exam traps
CompTIA often tests the misconception that the critical path is the shortest path or that there can only be one critical path, when in reality it is the longest path with zero float and multiple critical paths can exist simultaneously.
Detailed technical explanation
The critical path is calculated using the forward pass (earliest start/finish) and backward pass (latest start/finish) to determine total float. Activities with total float = 0 are on the critical path. In complex projects, near-critical paths with very little float (e.g., 1 day) can become critical if delays occur, requiring continuous monitoring and schedule compression techniques like crashing or fast-tracking.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Project Management Concepts — This question tests Project Management Concepts — Read the scenario before looking for a memorised answer..
The correct answer is: It has the longest duration and zero float. — The critical path is the longest path through the project network diagram, determining the shortest possible project duration. It has zero float (or total slack), meaning any delay on a critical path activity directly delays the project. Option B correctly captures both the longest duration and zero float characteristics.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
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.
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