The all day (perhaps even multi-day) technical screening, covering data structures and algorithms, threading, sql, database transactions and locking, and often

The all day (perhaps even multi-day) technical screening, covering data structures and algorithms, threading, sql, database transactions and locking, and often a few branches of math, getting shuttled from interviewer to interviewer for a fresh grilling. I don't like this, and I don't consider it a good use of anyone's time, but the deal killer is the "homework assignment", which forces me to spend 4-8 hours but allows them to screen me out in 15 minutes if they don't like my code. As my high school history teacher said to a class of unmotivated late second semester seniors - "I'm not going to waste my time on you if you won't waste your time on me."