1. Pro C: very good hands-on experience on Pro C and good on pl/sql; should have worked on sql queries.
2. C: Good hands-on experience on C upto the basic data structure level (stack, Queues, Linked list)- mandatory with good working experience on Network programming, TCP/IP, multi-threading and IPC (interprocess communication channel) desirable.
3. UNIX: should be very good on UNIX commands, hands-on experience on UNIX shell scripting and should be good on debugging skills.
4. Candidates from GSM background preferred.