You might not have that experience, but I've seen otherwise. A company I worked for hosted an on-site two hour coding exercise (they gave you a computer, some b

You might not have that experience, but I've seen otherwise. A company I worked for hosted an on-site two hour coding exercise (they gave you a computer, some boilerplate code, and a several tasks that were complete when you passed their unit tests) that was outlined during the phone interview so candidates knew what to expect. But while I worked the boss would regularly complain about people refusing to do the onsite exam, people cancelling last minute, people refusing the exam once they were shown what they were about to do, people excusing themselves in the middle of the exam and ditching, etc. These are people with 5-10 years of experience on their resumes given to him by recruiters. I personally thought the test was a little overwhelming (not hard, just too much considering the intense pressure of an interview) but I managed to get through it, and so did everyone else he had hired up to that point. He churned through a lot of people, though.