The following PMP® exam sample question is taken from the Free PMP Exam Simulator at http://free.pm-exam-simulator.com - The answer is at the very bottom:

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You just took over the management of an industrial construction project, which is in the execution phase. You determine that your team is communicating directly with their client company's peers. According to the Communication Management Plan, all client interaction should be performed through the project manager. What is the potential reason for your team's behavior?

A.) The Communication Management Plan is not comprehensive.
B.) The Project Management Plan has not been shared with the team.
C.) The previous project manager is not a PMP.
D.) The Communication Management Plan was later updated.

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Hint: The Project Management Plan contains the Communication Management Plan.
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Cornelius Fichtner, PMP
President, OSP International LLC
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ANSWER AND EXPLANATION:
The correct answer is B
Explanation: Answer choice ‘A’ is incorrect since the scenario indicates that the Communication Management Plan is intact and it outlines that the project manager is responsible for all the interactions with the client organization. Answer choice ‘D’ is also incorrect since there is a conflict between the Communication Management Plan and the team's behavior. Answer choice ‘C’ is incorrect since we can't conclude from the scenario whether the last project manager was a PMP or not. The Project Management Plan contains the Communication Management Plan and this information was neither shared with the team nor was it enforced.
Reference: PMBOK Guide 4th Edition, page 251