eBay interview questions

Got recommended via my school, went to one interview and got the job.

Applied online through LinkedIn, received a call from recruiter regarding next steps. Soon I was scheduled to talk to a Sr. Software Engineer for a 45 min technical interview. Questions- basic resume drilling, OOP theory questions, mutli-threading, synchronization, deadlock why String is immutable? Config files in Hibernate next I got call for onsite interview in a week- met with 3 s/w engineers (seniors) and 1 product manager (she took me to lunch as well, but while we were eating she made me do a coding exercise on board which I think was odd and impolite and rushing through it plus she wasn't really helpful during the interview) and finally with HR. some Questions- static/non static, variables/methods, final how would you sort a very very large file basic data structures design a basic inventory system