CSC interview question

Here communication is not mondaratory u need to be very strong at technical especially core java,sql,data structure basics,servlets,dbms concepts.. 1.what is data abstraction? 2.what is method overloading with an ex program 3.what is polymorphism with an ex 4.define thread?how many ways of creating thread? 5.what is multilevel inheritance with ex program? 6.why java does not have multiple inheritance? 7.why java doesnot support pointers? 8.diff between extends and implements keyword? 9.marker interface 10.diff betwern c++ and java? 11.synchronized method 12.codd rules 13.relational database 14 data anamolies 15.transaction and its properties 16.joins in sql 17.normalization 18.integrity constraints 19.fibanacci series,reverse of a string,polindrome number etc basic programs. If u clear this round 90% u r selected.My suggession is be gud at core java and sql..core java is mondatory for CSC. Hr round willl be not that important. They asked me only 3 question 1.are you willing to relocate? 2.tell us about ur family? 3.why u need this job?