Technical interviews always get your hopes up, and then you accept the job and over the next six months not once does an engineer come into your office and ask

Technical interviews always get your hopes up, and then you accept the job and over the next six months not once does an engineer come into your office and ask you if you know what a Collatz number sequence is, then explain it to you and ask you to write some functions that would allow him to find the longest iterations through the Collatz sequence, given a set of starting numbers. It's practically bait and switch. (EDIT: this was actually a joke...)