D.R. Horton Software Developer interview questions

Sorry, I didn't understand most of the things they asked. Interview started off with relatively difficult questions I was able to answer (ie, design patterns, best practices for caching, tons of WCF questions), then quickly spiraled into bit-and-bytes to the Nth degree. Most questions were paragraph-long situational questions, which were followed-up with 'but how do you KNOW thats the best way to go about it...'