1. Difference between Interfaces and Abstract 2. Can we declare a variable in interface 3. Can we declare a event in interface 4. Can One interface inherit another interface 5. Can on abstract inherit another abstract 6. When we use inheritance and when we use abstract 7. Method overloading and method overriding with realtime examples 8. Difference between thread and Task 9. How do you manage transactions in entity framework with different repos 10. What is repository layer