Onward Technologies Limited Java Developer interview questions

They conducted 3 rounds... 1-round they asked Aptitude questions and 2-round was Group Discussion based on AI.. 3-round Technical round... In technical they asked self intro and then they asked multiple questions what is the difference between overloading and overriding? What is thread? I have an object multiple threads are trying to access that object how can you solve this? What is your major role in your final year project? and so on.. 4.HR