Cisco Software Developer interview questions

They first send me 2 code challenge. it is very time consuming. One is about to design a hash on cash layer. and another is about unix. I feel that it is really unnecessary to be in that way.

Basic java questions , data structure linked list , tree , sorting basic . Java questions on OOPs concept, threadind (producer and consumer), collection basics. Programs-- basic programming on merge sort , fibonancee , array reverse ,