Give up the exam, no one will stop you. ...
However, if you do this, you will bear the consequences.
In addition, there is another situation that may make you want to go, but you can't go for a while: if the interview has already started, candidates are not allowed to go out privately for a certain period of time in order not to reveal the topic ... In this state, if you want to go, you have to wait for a while before going out. ...