Infosys System Engineer interview questions

Initially when i entered the room , i was asked to introduce myself and right after that the interviewer asked me to write the code on how to reverse a string followed by how to swap two variables without using the third variable. After these he asked me about the four principles of OOPs , difference between Method overloading and Method overriding. Lastly he asked about the famous hill stations in my hometown and the typical HR type questions.