The practice tests are designed and created in such a manner that it will enhance your knowledge and you will be able to determine where you lack the conceptual information. It will tell you about your dark and weak areas which need further nourishment to pass the exam. It is not recommended to rely only on these practice tests, but also read the books and perform the practices so that you may get the better gist of all concepts which are mandatory to pass the original exam test.

However, you may find the duplication of questions and answers, this is because, repetition is added so that you may see the questions again and again and memorize it in short time and learn about the concepts in short time. If you find the questions appearing again, dont worry they are intended this way to strengthen your practice. You just keep moving on until you finish all the practice tests. These practice tests will make up your mind about original exam that how you will encounter the question in LAB and what kind of difficulty you are going to face while sitting in examination center. An important thing to remember, always have faith in yourself.

Best of Luck