New PMP Question & Answers with explanation

Using the earned-value analysis technique, a project manager calculates a schedule performance index of 0.75 and a cost performance index of 1.25. To bring the schedule back on track, the project manager decides to allocate additional resources to critical activities in order to complete them faster. What technique are they using to control the schedule?
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Brad works as a project manager for a prominent law firm. His latest project involves an office move that will accommodate a 10 percent growth in staff over the next two years. Because of an unexpected increase in infrastructure costs, he calculates that he will be $2,000 over budget. What document can Brad reference to determine whether this falls within the allowable threshold for budget overages?
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Julie is a product manager responsible for a line of smart water bottles that connect to a mobile app to capture data and provide suggestions regarding your drinking habits. As part of her usual routine, she grabs a cup of coffee in the morning, sits at her desk, and evaluates the prioritization of user stories. She considers which feature should make it into her next release. What is Julie looking at?
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The Project Integration Management Knowledge Area is concerned with which of the following?
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A project sponsor called the project manager to express concern over not seeing the latest weekly update on the progress of the project. What is the sponsor looking for?
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