You can mark the questions you are unsure of. There will be a checkbox labeled Mark Question. Before the exam ends you will be able to review all the questions you marked or left incomplete.
Hope this helps
Cheers and Good Luck
If you didn't answer them, they will be marked incorrect.
when you finish there is a review button which allows you to review your marked questions
Which certification exam are we talking about here? Some exams you can't go back and change your answers.
yes. You can change your answers on CompTIA and Microsoft tests.
This thread is getting plain silly.
This is very simple to understand. There is a button near the bottom of the screen that says 'Previous Question' or something similar. Simply push that button to go backwards during the exam. Likewise there is a button that says 'Next Item' or something similar if you need to go forward again.
During the exam on every question there is a checkbox that says 'Mark item for review'. At the end of the exam you can 'Review all marked items'.
What everyone has already said is exactly how it is. If you ask another question regarding this I think I can say with a high probability that you should not take any certification exams, at least not in the English language.