Pergunta de entrevista da empresa Redwood Software

what is final variable, final method, final class Internal working of Hashmap how we handle the collision in hashmap how to use hashing in security like securing password How do you store USERNAME and PASSWORD in DB What are rest API methods and describe them in one line What is mutability and immutability in Java How to make anything immutatble in java what is record in latest java what is the difference between UNION and JOIN How to make things thred safe in Inheritance what Security feature springboot provide What is JWT Token Authorization and authantication