New PMP Question & Answers with explanation

A project manager plots the degree of certainty and complexity of a project along x- and y-axes to determine what type of project management approach would suit the project best. The exercise reveals that the project falls within the “complex” quadrant due to moderately uncertain requirements and highly uncertain technical challenges. Based on this information, what type of approach should the project manager use to manage the project?
Select one
You are the project manager for a project that will produce a mobile phone application that sends alerts when UV rays are at dangerous levels, alerting users to stay indoors. During a team meeting, you stress the importance of documenting both explicit and tacit knowledge. What does tacit knowledge refer to?
Select one
A project manager is working through potential options using a decision tree. Scenario A has a failure impact of –$5,000 with a probability of 25 percent, and no impact if successful; and scenario B has a failure impact of –$3,500 with a probability of 65 percent, and no impact if successful. Which scenario should the project manager choose?
Select one
Around 2:37 p.m., Bruce Bethor, the project manager for Happy Holiday Cruise Ships, Inc., walks around the office to interact with each member of his team. The majority of his team members enjoy this type of informal interaction because it gives them an opportunity to bring up issues they may have forgotten to mention during the morning meetings or those issues that were recently uncovered during the day. Which of the following techniques does Bruce use to stay in touch with the work and attitudes of his project team members?
Select one
When should Agile teams hold retrospectives?
Select three