New PMP Question & Answers with explanation

A project manager of a retail chain of hardware stores is in the process of generating the project schedule. After the project manager issues the project assignments, a team member approaches him to say that he has a two-week planned vacation right in the middle of a critical activity. What did the project manager fail to do?
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Which of the following best describes virtual teams?
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With the first major milestone around the corner, the project manager has decided to move all the active project team members to a war room. This is an example of:
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Which of the following best defines internal rate of return (IRR)?
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Tom is a project manager working for a reputable editorial agency specializing in exam preparation. He and his team use Agile approaches to manage projects. Because of the company’s growth, three new project managers have been hired, and Tom has stepped up to mentor the new hires. Given their limited experience with Agile, he decides to walk them through the four values and twelve principles that define Agile in order to help them adopt an Agile mindset. What is Tom reviewing with the project managers?
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