Cognizant interview questions

First introduce myself Question on java like difference between method overloading and method overriding, types of inheritance, questions on garbage collection and opps , Java code on fibonacci serious, questions on SQL like what do you mean by DML commands and DDL commands difference between truncate and delete, Sql query on find second highest salary, At at last she asked are you ready to relocate and are you ready to work night shift this was my interview experience..