I just took and failed 70-291 again. My first time with a 617 and second time with a 679. The first time I had 44 questions the second time 40 entirely different questions and 1 sim that was the same. Got three sims on each exam. For the first time I only used MeasureUp. I had already passed 70-270 and 70-290 with MeasureUp. Unfortumately 70-291 was nothing like the MesaureUp practice exam. The second time around I studied the Microsoft Traing Kit for 70-291. I still had a tough time with the exam. To my suprise I was asked several questions about Internet Explorer security configuration. This is an area I had no idea I needed to be familiar with for the exam. Hopefully on the third go arround I wll get questions I can answer. By the way does anybody know how the questions are scored. Do the sims count for more than the questions. Is partial credit given for partially answered sims? Is the test adaptive?