Oracle Software Engineer III interview questions

The entire process took around 3 months. A first explanatory call about the position with hr occured, then one call with the manager where we discussed about my current role and background. After some days an assignment was given to me which had to do with developing 2 small software tools . I submitted the code as we had agreed after some days. Then they vanished. They came up again after 2 months asking me for a face to face interview. There I've met hr/manager/tech guys with the last asking me some quizes ,technical questions and focused also on the work I've done in the assignment. The whole process took almost 3 hrs. Very friendly procedure with the tech guys being very nice and polite. Finally they've vanished again with not ever giving a single line of response in an email or even a call or whatever explaining rejection or what has happened. I would conclude that it's an extremely amateur process and I regret spending time for it . Totally not worth it at all. There are plenty of serious companies that may not be that big as this one but respect you better and ofc are better organized. Much better. If they treat you like this beforehand I'm curious how they'll treat you afterwards.