EPAM Systems Senior QA Automation interview questions

1. General JAVA questions like: - difference b/w abstract class and interface - difference b/w overriding and overloading 2. What is BDD and TDD (difference) 3. What tool you will be use for back/front end testing... 4. One programming task: Image you have a string with integers, letters, special characters....You need to retrieve only integers and if it is odd -> 'It is a odd', else (even) - > 'It is an even'