Hi, Bindu.
Most questions are multiple choice. Some are drag and drop. You get no negative marks. You must earn at least 700 points. Each question is weighed in points differently.
Charles' answer was good. I think you should also explore all the information on the Microsoft certification site, starting here:
https://www.microsoft.com/en-us/learning/certification-exam-policies.aspx
Exam details:
https://www.microsoft.com/en-us/learning/exam-70-646.aspx
Good luck!
Best wishes, Davin Mickelson