This was through campus placements at my university. There was a written test first, from which around 40 people were selected for the next round. Then I had two technical interviews and one HR interview. The details are as follows:

1. Written Test: This had 20 aptitude and 30 technical questions. The aptitude section included many questions from permutations, combinations, and probability. The technical section had a mixture of OS, microprocessor, digital electronics, C, and computer architecture questions, among others.

2. First Tech Interview: I was asked to speak about my projects. Then, there were a few basic questions about networks, such as different protocols and their functions, layers, etc. I was also asked to code for a logical puzzle.

3. Second Tech Interview: This was with a different panel. Again, I spoke about my projects. Then came questions based on computer architecture (pipelining, interrupts, etc.) and microprocessors (8085, 8051 based questions).

4. HR Interview: This was typical stuff: "Tell me about yourself," "Talk about some non-technical activity you have done in college," strengths, weaknesses, family, etc.

Explain the architecture being used in today's latest processors.

What happens when you ping a device? Explain at the layering level.