Cisco Software Development Engineer (SDE) interview questions

In the 1 interview round, the things were simple they asked me about some DSA problems, OOPs, in the second they asked me about my internship experience mentioned in my resume, then in the 3rd technical round they asked about CN, where they were expecting me to have some practical project on CN concepts, which i obviously didn't have, but my CN concepts were very strong. Still they didn't qualified me for the last round(HR round) sadly.

What are projects your have made?