Hi Rajesh,
While you write the certification, for each question if there is more than 1 answer it will say that there are 3 correct answers for this question or choose 2 answers for this question.
So after you read the question, you will come to know how many to tick answers.
Obvioulsy for radio buttons there is only 1 right answer and if check box then multiple answers need to choose.
By the way when you are planning to write?
Wish you all the best and Good luck
Regards
Raj