Oracle Software Developer interview questions

I applied for front end role. I was asked to provide the system design mainly focused on backend and application clustering. I answered them and I was thinking there may be more questions with it related to front end coding after this. But then there comes questions to write middleware/backend code. Even though this role was for front end position, I was not asked a single question about any of the front end technologies. Whole discussion was completely irrelevant with the role.