1) excutor service and how it works 2) What is thread pool 3) Spring Boot 4) DispatcherServlet 5) Difference Between Deadlock and Starvation 6) Create a SingleTone Class 7) What is Reflection 8) What is a Bean and How it is created 9) What is @Controller 10) Difference between Checked and Unchecked exception 11) What is an error 12) What is an S3 Bucket 13) Complete flow of MVC