1.Difference between stack and queue 2.Difference between stack and heap 3.what is threading 4.On which factor the Threading depends 5.Prime numbers 6.Reverse a Linked list 7.Tic-Tac-Toy game logic 8.virtual functions 9.what is abstract class 10.pure virtual functions 11.how internally virtual function works. 12. what you have learned in Oops