Supporting Windows 8.1
It covers all the objectives of 70-688 exam. It would help you master the
objectives so that you can pass the exam the first time you take it.
Microsoft not only tests you on your knowledge of the desktop operating
system, but also has developed questions on the exams to force you to apply
your knowledge to work out solutions in the same way you would when
presented with real-life problems. Passing the exam would demonstrates your
competency in administration and support.