K2View Experienced Java Developer interview questions

The HR called and scheduled an interview. This call was swift without many details about the company and the position, but as a person, she sounded nice. In the first interview, they asked me some Java principles like what is the difference between '==' and 'equals', what are the differences between ArrayList and LinkedList in Java. Then they asked some questions about finding the max height of a tree, and two more code questions which you probably can find on the internet. In the second question, they asked what is the advantage of micro-databases solution when you merge two databases. Both interviewers were kind, nice and seemed like a good person to work with.