I was called to interview with Cisco after meeting one of their engineers at a Job Fair. I had four rounds of interviews with three different teams.

Each round lasted at least 2.5 hours and consisted of multiple 45-minute interviews with different members of the team.

The complete interview process took about two months.

All of the interviews were technical and consisted of asking me about one of my projects, followed by technical questions regarding the field, and then a set of coding challenges.

The following are the areas in which I was asked technical questions:

• Networking
• Linux Programming
• Processes + Multithreading
• Memory Management
• General questions about C/Python

These are the coding challenges I was asked about:

• Checking the error in code and fixing it
• Counting the number of 1's in a binary number
• Reverse order traversal of a binary tree
• How to copy a string in C
• Finding the missing number in an array when given 1 to n numbers

Most of the coding questions were followed by some analysis and questions regarding possible errors.