Your question is Core Java and Spring Concepts. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about core Java and Spring concepts you use day to day, including StringBuilder vs StringBuffer, ArrayList vs LinkedList, equals vs hashCode, and key Spring annotations like @Autowired and @EnableAutoConfiguration.