Altimetrik Software Engineer - Java Backend interview questions

Got a Call from HR and scheduled a Hackerrank round (They have playground). I was asked complete it in one day. As it was for PayPal client, the hacker rank test had 30 choose questions from Java(tough ones but easy if you have in depth java knowledge) and 3 Coding questions out of which I solved two completely and wrote logic for one. Note - Please submit even if the code is not working. If you have the cut off they set, you will get a call for the second round with one of the Architect , he will mainly analyse the Java concepts, Problem solving skills and Data structures and also API designing skills. If you clear the round, you will be scheduled an interview with PayPal people, where the questions are asked from Java(Indepth, provide multiple solutions). Spring and Hibernate and different scopes of bean creation. Also I have been asked two coding questions where I need to say multiple logics and time complexity for each. After that HR round, you get the package you asked and the offer is released after two days.