New PMP Question & Answers with explanation

Without a project manager's knowledge, an unofficial communications platform on social media was established to ensure effective communication among team members. The project manager learns that the platform is being used inappropriately. What should the project manager do?
Select one
During the execution phase of a software development project, several overseas developers join the team. What should the project manager update first?
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A stakeholder believes that information is lacking and asks the project manager about the project's status. What should the project manager do?
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During project execution, the project manager determines that communications fail to comply with the communications management plan. What should the project manager do?
Select one