New PMP Question & Answers with explanation

If you are working on a project with constantly changing scope, which type of contract would work best when hiring an outside vendor to complete a portion of the work?
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A seller organization was executing work for a project under a contract. During the course of the project, a number of disputes arose over the scope and quality of the work. Which of the following is the preferred method of resolving these claims?
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The scope of work in a project could not be clearly defined. There was also a strong possibility that the scope would change during the course of the project. Which type of contract would suit this type of situation?
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Erica is managing a kitchen tools manufacturing project, which is intended to produce modern cooking ovens. This project is hugely important for the company as well as for Erica‘s career. Although the project scope statement was well-defined and requirements were gathered from stakeholders in the planning phase, many design change requests have come in from customers during project execution. Which of the following tasks must Erica perform to avoid scope creep caused by uncontrollable changes?
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After conducting a bidder conference, you receive an email from one of the bidders requesting additional information. The information was neither included in your request for proposal, nor did anyone ask for it during the bidder conference. You realize the answer to this question is critical to understanding the scope of the project. If the answer is not communicated to bidders, they cannot size their teams accurately or estimate the total duration of the project. The answer also greatly affects cost. However, the answer contains some proprietary information that, if disclosed to a competitor, may reveal the future product strategy of your company. Such a disclosure could be disastrous for a major product launch you are planning next year. You decide to send the answer to all the bidders, but you realize one of the bidders is also working closely with one of your competitors on a similar project. What should you do?
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