HR will make the initial interview but since they are not technical, they' just asked about your background. Department head will give technical interview as well as exams. Technical exam will test your programming skills; related with POS and/or calculations. They'll inform you that they are partners with Oracle so you can also do configurations BUT don't believe this. They are re-sellers but the only project they have that involves Oracle is an integration project. No configurations required. Once exams/interviews are done, submission of requirements follows.