New PMP Question & Answers with explanation

During the execution of a project, a large number of defects were discovered. The project manager ensured that the issues, defect resolution, and action item results were logged into a defects database. What would the defect database be considered a part of?
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You are meeting with your stakeholders to gather requirements for your project. You are well aware that requirements to be gathered include both product and project requirements. All the following tools can be used to gather, define, and analyze project requirements from stakeholders except:
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You are managing a project with a large multinational staff. Susan, one of the engineers, was originally asked to deliver her part of the work on October 19. Due to a change in the critical path, her deliverable will be needed two days sooner. However, as the new deadline is still two weeks away and she is ahead of schedule, you are confident her delivery will be on time. During a staff meeting, you learn from John, her functional manager, that Susan celebrates a religious holiday on October 17. However, he also tells you that Susan is not particularly religious; if pushed a bit and offered some incentive, she may forego celebrating this holiday and come to work. What should you do?
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A project manager estimated that a project would require 4375 personhours of effort. The project ended up using 6250 person-hours of effort. The difference between these two figures is a:
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Dina, the project manager of a hardware project, is performing a structured review of the procurement process. She would like to examine each document from the Plan Procurement Management process through the Control Procurements process to identify failures. What tool should Dina use?
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