1) Difference between virtual and pure virtual functions? 2) What can we do to increase the efficiency of the code and eliminate warnings when compiling? 3) How can the high level code be changed to machine level code? 4) What is the static variable equivalent in MATLAB? 5) What are 6 special member functions in a class? 6) What is data alignment? 7) What are the differences between stack, heap and a register? How to store a value in a register?