Do not attend questions,you have no idea about.Do not make wild guesses.But do not play so safe that you attend very less questions.Take your decision wisely in exam. 

Hey 

To overcome your negative marks first  you have to clear your concept even in theory part second  whenever you have to go through your weekly test  you must have to clear that question in which you were very confident. And after that go though that question in which you have confusion and when solving these confusing question confusion still comes then leave that ques. Solve and practice more and ques 

Good luck

Hi Hitesh,

The negative marking system is risky and it totally affects your score. Candidates make mistakes while answering the questions for which they are not completely sure. So, answer only those questions for which you are 100% sure. If you have confusion between options then don't think about which can be right answer, think about which is wrong and just eliminate it. Last option will be your answer. 

Hope this helps. All the best!!