The exam is different every year, so no one knows what the test will be. There are life and death situations, but they don't try to make you kill anyone. However, the first one I went to a had a guy going around killing contestants but that wasn't part of exam. That guy is just a twisted asshole.

There was other one that wanted new people to fail, he was an asshole but not as bad as the twisted guy.

[No one is as bad as hisoka except maybe Killua's oldest brother.]