New PMP Question & Answers with explanation

A project is contracted on a Cost-Plus-Fixed-Fee (CPFF) basis with a fee of 10 percent of estimated costs. The estimated cost is US$50,000. If the project comes in at US$75,000 with no changes in project scope, what would be the total cost of the contract?
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A first-time project manager wanted to have a “perfect project.” This manager informed the customer that this project would not accept change requests of any kind and that the scope would need to be defined precisely at the very start of the project. The customer agreed to this request. What would your comment on this situation be?
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Product scope is measured against the product requirements, while project scope is measured against:
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During a weekly status meeting, a team member suggests adding a component to the project. As the project manager, you maintain that all focus should stay on the current scope and not on any enhancements. Focusing on the current scope is an example of:
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As the Project Manager for Midway Carnival Rides, you are beginning the Define Scope process. Which of the following is a key input to this process?
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