Oracle Senior Software Engineer interview questions

Mostly about Java, OOP and few basic algorithms. Reminded me a lot questions from Java certification.

I was asked to program an application that takes cares of the wages of employees for their extra working hours. provided that you have to follow the OOPS and implement design pattern and write test cases and all the test cases should be passed. The code should be reusable for future and should use junit for test cases. Once done, code was reviewed by their developers and asked queries regarding the approach, design pattern, ER diagram of the code etc. Overall it was a good experience.