posted 21 years ago
Some questions are better than others.
IBM has authored a practice exam as part of one of their sequence of exams. That's professionaly written questions. In another forum you can find smart people with wildly varying ideas as to which answer is right.
The questions written by individuals for free are often of lower quality than IBM's. Some of these questions are very good.
Never-the-less examining the questions and researching the answers will expand your mental horizons.