Wipro interview question

Stream API, Lambda, Java 8 features : Optional class, functional interface 6. OOPS concepts 7. method overloading and over ridding 8. When is overriding used 9. Unreachable catch block 10. Why is string immutable 11. Difference between string Builder and Buffer 12. what are the components in @springBootApplication 13. Agile methodology 14. Design patterns 15. What does static keyword do 16. Can static methods be overloaded 17. valueOf() Some logic based coding Questions on previous projects