C-DOT interview experience

C-DOT is a telecommunications R&D company which works for government of INDIA

They shortlisted 5 people based on the CGPA. 

They asked my class placement representative about the courses we had in our academics a day before the interview.

The questions are mainly from the interesting subjects told by the candidate

My interview went as follows:

1. tell me about your self.
2. tell me about your family, interests,strengths& weakness.
3.  interesting subjects (Data Structures,Computer networks & Cryptography)
4. what are the cryptographic techniques in use.
5. tell how AES works
6. how two nodes communicate using AES
7. what is aloha
8. how performance in aloha can be increased
9. what is ARP
10. what is BOOTP
11. how BOOTP differ from RARP
12. write a program to print non duplicate elements in a array (value of an elements is from 1 to 100)
13. what is priority invertion
14. what is deadlock
15. how deadlock can be removed
16. what is meant by a signal
17. we have a multi tasking problem. For this multi process is better or multi thread is better 

My friend interview went as follows:

1. Strength and weakness
2. Hobbies
3. Introduce yourself 
4. What is super scalar architecture?
5. What are the applications of queues in os?
6. Difference mutex and semaphore
7. Fragmentation
8. Character stuffing
9. HTTP
10. Write a c program to reverse a single linked list?
11. Priority inversion
12. Synchronization
13. Pipelining
14. Explain my project