New PMP Question & Answers with explanation

Emma is a project manager working on a project that will require a specially engineered machine. Several manufacturers can make the machine to the specifications Emma needs. She will use purchase price as the sole criterion for choosing from among the vendors. Which of the following is true regarding this question?
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What action can a project manager take if the selected risk response strategy turns out not to be fully effective?
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You are a senior project manager for a company that produces mobile phone applications. In your latest project, you have teamed up with another project manager, who will manage a subset of the project. She tells you that the work packages have been decomposed and milestones captured for her deliverables. Together, you review her list of milestones, the first of which reads “Finish GUI: 30 Days.” What is wrong with this scenario?
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Your project sponsor has reviewed the initial project schedule you created for the project. She is not happy with the project end date because it doesn’t match the promise date she gave the customer. You decide to use some compression techniques first. Which of the following statements should you keep in mind (and know to be true) regarding duration compression?
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You are a project manager for Time Will Tell, an international watch manufacturer. Your project entails developing a watch with global positioning satellite (GPS) capabilities. Kit is a junior staff member with two years of experience in GPS technology. Carrie is a senior staff member with five years of experience working with GPS technology. You are developing the activity duration estimates for the project activities. You are trying to determine an estimate for a particular activity that involves GPS skills and knowledge. Carrie has worked on activities similar to this in the past. She tells you the activity will likely take 45 days. All of the following statements are true regarding the information in this question except which one?
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