Quick Answer
The answer is the lessons learned register and the lessons learned report. These two documents capture lessons learned at different stages of a project: the register is a living document used throughout the project to record knowledge gained from successes and failures, while the report is a formal summary created at project closure to communicate those insights to stakeholders and future teams. On the CompTIA Project+ PK0-005 exam, this distinction tests your understanding of the PMBOK Guide’s knowledge transfer process, and a common trap is confusing the register with the report or assuming only one document is used. A helpful memory tip is to think of the register as a rough draft notebook that collects raw entries, and the report as the polished final chapter that tells the story to others.
This PK0-005 practice question tests your understanding of tools and documentation. 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 is reviewing the lessons learned from a previous project. Which TWO documents are commonly used to capture lessons learned? (Choose two.)
Issue log
Why wrong: Issue log records problems, not lessons learned.
Change log
Why wrong: Change log records changes, not lessons.
Lessons learned register
This register captures lessons throughout the project.
Risk register
Why wrong: Risk register tracks risks, not lessons.
Lessons learned report
This report summarizes lessons at project completion.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Lessons learned register
The lessons learned register (Option C) is the primary document used to capture lessons learned during the project, as it records knowledge gained from the project's execution. The lessons learned report (Option E) is the formal document that summarizes and communicates those lessons to stakeholders and future projects. Both are standard outputs in the PMBOK Guide and CompTIA Project+ (PK0-005) framework for knowledge transfer.
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.
Issue log
Why it's wrong here
Issue log records problems, not lessons learned.
Change log
Why it's wrong here
Change log records changes, not lessons.
Lessons learned register
Why this is correct
This register captures lessons throughout the project.
Related concept
Read the scenario before looking for a memorised answer.
Risk register
Why it's wrong here
Risk register tracks risks, not lessons.
Lessons learned report
Why this is correct
This report summarizes lessons at project completion.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse the issue log or risk register with lessons learned documents, because all three involve tracking project events, but only the lessons learned register and report are specifically designed for capturing and sharing knowledge for future projects.
Detailed technical explanation
The lessons learned register is a living document updated throughout the project lifecycle, capturing both positive and negative experiences, while the lessons learned report is a final deliverable created during project closure. In the PK0-005 exam, the distinction is critical: the register is for ongoing collection, and the report is for formal dissemination. A real-world scenario might involve a project manager using the lessons learned register to note that a specific vendor caused delays, then summarizing this in the lessons learned report to guide vendor selection in future projects.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the PK0-005 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Tools and Documentation — This question tests Tools and Documentation — Read the scenario before looking for a memorised answer..
The correct answer is: Lessons learned register — The lessons learned register (Option C) is the primary document used to capture lessons learned during the project, as it records knowledge gained from the project's execution. The lessons learned report (Option E) is the formal document that summarizes and communicates those lessons to stakeholders and future projects. Both are standard outputs in the PMBOK Guide and CompTIA Project+ (PK0-005) framework for knowledge transfer.
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 24, 2026
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