Perguntas de entrevista de vagas de Junior Java Developer da empresa Wallet Hub

The usual interviewing process with the first round containing a set of questions which I found very interesting, the second round with an HR employee and a third one with the top Architect. Although I didn't get an offer I saw the set of tests as good learning material. Overall experience is blurry as I do not understand what an employer wishes for an Entry / Junior Developer to know !