Exam Prep GuideFully updated for Windows Server 2008 R2! Ace your preparation for the skills measured by MCTS Exam 70-642-and on the job. Work at your own pace through a series of lessons and reviews that fully cover each exam objective. Then, reinforce what youâve learned by applying your knowledge to real-world case scenarios and practice exercises. This official Microsoft study guide is designed to help make the most of your study time.