Questions

Why do we hide data behind getters and setters?
What is the difference between an ArrayList and a LinkedList? When should you use them?
Explain insides of a HashMap
Explain insides of a TreeMap
Abstract class vs interface
Why calling public methods in a constructor is a bad practice?
Overriding vs overloading
Explain exceptions (checked/unchecked)
try-catch-finally - in which order should the exceptions be handled?
What are generics? Why don't just use Object?
When should reflection be used and why you should avoid using it?
When are annotations used?