Nomus Comm-Systems Trainee Engineer interview questions

1)tell me about your self? 2)explain project? 3)basics of c (storage class,use of extern,static, using bit wise exchange content,memory organisation,where in the function static variable is stored,make file ,implement strcmp ,etc.) 4)system calls you know,program to open file write to file and close file using system calls 3)what is router,ip address (with classes)? it was around 40-50 minutes