Mavensoft Technologies Software Engineer interview questions

Position : Dot Net Developer First Round : Written Test some of interview questions in first round i remembered 1. update_statistics command usage? 2. difference between abstract and interface? 3. what is REST? 4. what is CAS? 5.types of locks in sql server and it uses? 6. difference between wcf and web services? 7.can we write nested RAD ajax in RAD ajax? 8. difference between wcf and asmx web services? 9. what is meant by serialization?and how it implemented? 10. asynchrous controller in mvc .... some qestions on wcf and mvc