First round was normal - simple question and code logic - Delete a Node in Linked List , Find missing number is sorted array Second round was collaborative - Interviewer was involving .questioning on your understanding in every detail - which language do you like most and why ? Show me examples on your understanding of a particular topic(destructor/scope). Implement stack API(How is min size of stack is considered). Questions on why are we asserting at checking the valid i/p in API , why do you have certain return values and example of how your stack is used. Implementation of malloc , why is header used in malloc .How more efficient can you decrease the size of header. Final Round-Hiring Manager round- started with a DS implementation, how does switchsave the IP address of a route in Data structure. what is/Implement Patricia tree. How are bytes order in a switch (when we are programming code - will it be in little endian/big endian and will it be hton/ntoh). Best way to save space of a DS.( Never use int , use only uint32_t .) The way you give naming to a variable is very important and the way you write comment to your API's. - Naming of variable is imp - Use as less amount data as possible to achieve a functionality. (uint32_t vs int ) - Know how address format will be on switch (programming)(ntoh or hton / big endian /small endian) - Its ok if you dont know a DS , be strong with basics.

it was on coderpad and was asked to write everything including driver code. It was on linkedlist and tree mostly, followed by pointer questions. It was just the first round which focussed on data structures and algorithm rather than just operating system concepts. Interviewer was chill