Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 3 years ago

If a person deliberately did not fast any day of the Month of Ramadhan, he has committed a sinful act and he must that day as Qadha and he must fast two months or feed sixty poor Momineen for not fasting that day.

Exams is not be a valid reason to leave fasting, so, the above rule is applicable.