Hello,

It is subjected to the rule and regulations that your colleges has set.Few institutes set a period of time within which the candidate must pass in the subjects they have failed.If not they must take re-admission and start studying graduation again from first year.The period of time may vary depending on the college.If your college doesn't have any such rule you can appear in those two exams, pass in those and complete your third year and get your degree.You need to enquire regarding this in your college administration.