No clarity on interview process, they followed different process for different people based on recommendations. Few had only 2 rounds few had 5. I don't know on what basis they select the people, I had technical round which was really good and I was sure but they made me to wait till end of the day and when I asked them then they searched for resume and feedback as not cleared. Worst experience ever....

Overloading and overriding.

StringBuffer and StringBuilder.