I applied via an online portal. HR called me and asked me to take an online test (HackerEarth) within 2 days. After 2 days of the test, I got a call from HR asking to attend F2F interview on a weekend at their office. He mentioned that only one technical round and one HR round will be there. Coming to technical round, the interviewer asked about my projects, education etc. Later, he asked basics of C++ and OOPS basics. He specifically stressed about C++ only and mentioned that answer all answers of OOPS with respect to C++. He seemed to be a non-technical person. Asked output of some sample codes which have compilation errors. Later, asked to write C++ function to remove empty spaces in a string from front and back depends on boolean parameters on paper. He had a glance through it and evaluated its complexity basing on number of if cases I wrote ( I wrote 3 cases to handle edge cases). He said I don't have enough experience in C++ ( I have 2.5 years experience in C++ alone ).