Exam Cheating, University Admission, Huqooq Ul Ibad
We have discussed it before. Take the example of bribery. To get your rightful job done if Yiu have to give bribe, You are not blameworthy. If it was an open merit You would have got the seat, so you did not usurp others seat. Secondly, after getting an illegal admission ( with no excuse for illegal admission) one attains the required skills, his income through his skill is halal. However, the sin of getting illegal admission will be there.
If it is a situation of compulsion, one is excused. So the person has to decide in the given situation. If he finds he was compelled, it is ok, if he did something wrong, he should repent.