There are way too many unmentioned factors to answer that question. As Mom mentioned normally emergency or bereavement is available, but there always can be mitigating circumstances. My grandmother died during my Plebe Year - unfortunately the weekend before exam week, I didn't even ask for leave and my family fully understood. My son was in WESTPAC when his grandmother died, again it was understood that he would not attend.
A clue: always use the American Red Cross to notify the service member's command of a death in the family - it just works better.