Cisco exams have a reputation for including questions that can be difficult to interpret, confusing, or ambiguous. In my experience with numerous exams, I consider this reputation to be completely justified. The Cisco exams are tough, and they're deliberately made that way.
The only way to beat Cisco at its own game is to be prepared. You'll discover that many exam questions test your knowledge of things that are not directly related to the issue raised by a question. This means the answers you must choose from, even incorrect ones, are just as much a part of the skill assessment as the question itself. If you don't know something about most aspects of the Cisco IOS, you might not be able to eliminate answers that are wrong because they relate to an area of the IOS other than the one that's addressed by the question at hand. In other words, the more you know about the IOS and the hardware environment, the easier it will be for you to tell right from wrong.
Questions often give away their answers, but you have to be Sherlock Holmes to see the clues. Often, subtle hints appear in the question text in such a way that they seem almost irrelevant to the situation. You must realize that each question is a test unto itself and that you need to inspect and successfully navigate each question to pass the exam. Look for small clues, such as the mention of command mode, IP ranges, and configuration settings. Little things such as these can point to the right answer if they're properly understood ; if missed, they can leave you facing a blind guess.
Another common difficulty with certification exams is vocabulary. Cisco has an uncanny knack for naming some utilities and features entirely obviously in some cases and completely inanely in other instances. Be sure to brush up on the key terms presented at the beginning of each chapter of this book. You also might want to read the glossary at the end of this book the day before you take the test.