New PMP Question & Answers with explanation

Which process is concerned with providing forecasts to update current cost information?
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A project manager calls you in as a consultant to provide input on developing the Project Charter. According to the PMBOK, your contribution to the project could best be termed as:
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What is a recommended method for controlling change within a project?
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Mark is in the middle of a software development project. So far, the project has incurred a total cost of $50,000. If it is determined the project is no longer required, what would we call the cost incurred to date?
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A project post-mortem is an activity, usually performed at the project’s conclusion, to determine and analyze a project’s outcome which also includes a lessons-learned gathering exercise. Project post-mortems help to mitigate future risks and are often a key component of, and ongoing precursor to, effective risk management. Which of the following is a terrible mistake when collecting lessons learned?
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