If you are having trouble with a Performance Based Questions, mark it and move onto the next question.
This can be said for both the Performance Based Questions and the multiple choice questions. CompTIA exams allow you to mark a question for later review. The Performance Based questions are challenging, and you do not want to spend too much of the allotted 90 minutes on these questions.
Tips for Multiple Choice Questions
The number of multiple choice questions will vary from exam to exam, but they will be multiple choice. There will be no true/false, no short essay, and no fill in the blanks. So the good news is that the correct answer (or answers) is/are there; you just have to find it/them. Being familiar with the technical jargon will go a long way to help you pass the exams.
Take advantage of the acronym list from this GetCertified web site. Reviewing this document will be invaluable.