As per HR first round is on Coding. it doesnt matter if you are 5 years or 20 years, they will ask you exactly same question .. i was told, there is a coding test on subnet .. and the interviewer was pathetic .. he started asking questions as 5 years exp guy .. and he came up with his own functions prototype and asked to complete .. question - Write the code for finding if the ip is within the subnet or not. (prototypes are given - which will be confusing)