Oracle Software Applications Developer interview questions

Applied online, HR manager called for scheduling for an interview. It was online vide call. Round 1- Started with an introduction and then I was given 3 problems and interviewer was looking for approach. When he agreed with approach he told to code that on some shared document.

There were 3 rounds in total back to back and all the rounds were technical. I was asked to write different programs on finding shortest path, string manipulation, matrix sorting, inheritance, method overloading, multi threading, complexity etc