Amdocs interview questions

Can you write a program to sort items?

What are OOPS principles? Diff bt Overloading and Overriding? Can we overload on the basis of return type? Diff bt Abstract and Interface, Why Abstract not interface? Exception Handling and types, what will happen if an exception occurs in the base class? What is Thread Pool and Executor? What is Spring Bean? What are DI, IOC, and @Qualifers? Scopes of Spring Bean? what are Singleton classes, implement through code? Count the stairs Code Problem? What are Join and types and Write a query to return employee id, department wise?