Cisco visited our college.

There was a written test lasting approximately 1 to 1.5 hours. The questions covered aptitude, quantitative ability, data structures, C programming, microprocessors, communication networks, embedded systems, and some semiconductor details. There was no negative marking.

Approximately 20-30 students were shortlisted for the interview. The interview questions included:

• Analyzing C code for errors, specifically related to passing arguments by value versus by reference.
• The difference between RISC and CISC architectures.
• Nyquist Sampling theorem.
• Shannon's second channel source coding theorem.
• Principles of CDMA operation and encoding formulas.
• Questions about the Network layer in the OSI model (e.g., IP datagrams).
• Questions related to Ethernet addresses and broadcast routing.
• Questions about domain names, DNS servers, NAT, and DHCP.

About DNS Servers.

The interviewer kept asking me questions about this topic.