New PMP Question & Answers with explanation

A project manager has been asked to calculate the payback period for her project. The project’s investment is $500,000, with expected cash inflow of $50,000 for the first two quarters and $100,000 for every quarter thereafter. What is the payback period?
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You are in the process of attaining and assigning resources to the project. You have both internal and external resources. You will be hiring your external resources using a work order against a contract you have with a local staffing agency. All of the following are true except for which one?
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The difference between project deliverables and project requirements is best described in which of the following options?
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A project sponsor asks the project manager to observe nonverbal feedback in the upcoming status meeting and adjust his presentation based on these observations. Which process is associated with these activities?
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The project team recently participated in a working session to examine and document the effectiveness of risk responses in dealing with overall project risk. What project management process are they performing?
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