It was an on-campus hiring process at an NIT. The process comprised an online test, two technical interviews, and one HR interview. Around 50 students applied for the online test. Ten students were selected for interviews, and finally, three students were selected.

In the technical interviews, questions were asked about programming in C and C++, as well as theoretical topics from Analog Communication, Digital Communication, Wireless Communication, Antenna Theory, and Digital Electronics.

What is fading? What signal characteristics change in fading and how to recover them? (Wireless Communication)

Types of Multiple Access Technology (TDMA, FDMA, CDMA). Which technique is used in GSM?

Describe a communication system and each block in it. How to design a transmitter and receiver.

What is modulation? Need for modulation. Describe all types of modulation (Analog and Digital).

What is a linked list? Difference between an array and a linked list. How to add and delete an element from a linked list. Tell the algorithm for that.

Write a C program to find the factorial of a number, and to check whether a number is an Armstrong number or not.