As others mentioned it too, stupid quizzes. I applied for a job as a PHP developer and at the interview after a brief talk, interviewers gave a pen and a piece of paper and asked me to write a code to count a specific letter in a long string without using RegEx, loops and builtin PHP string functions. I simply left the paper untouched and rejected to go for a secondary interview.
Another thing that really bothers me is the rating question.
- In the scale of 0 to 10, what would you rate yourself as a PHP developer?
And no matter how you react to this question, the ball is always in the interviewer's yard. If you say 9 or 10, they'd be like okay congratulations!, we've found the next Fabien Potencier! And if you say 6 or 7, they say so why would you expect us to hire you?