New PMP Question & Answers with explanation

One of the performance requirements of a company website development project is that the home page should load in one second. Such performance requirements are usually part of:
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The requirements elicitation team has generated a large number of ideas during sessions to gather product and project requirements. Which of the following techniques is best suited to sorting these ideas into groups for review and analysis?
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Many quality problems plagued a project. The quality of the work products deviated considerably from specifications. The project manager decided to do a root cause analysis. What activities does a root cause analysis include?
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Janice, a project manager, wanted to obtain early feedback on the project requirements. However, she was concerned that the abstract representations of the requirements might not elicit useful feedback. Which of the following tools and techniques might help her overcome this hurdle?
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Projects, portfolios, and programs are different entities in an organization. Which of the following choices states a correct relationship between them?
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