Question 6 :
If a base class contains a member function func(), and a derived class does not contain a function with this name, an object of the derived class cannot access func().
It depends upon how the function func() has been defined in the base class. If the function func() is defined public in base class then an object of the derived class can access the function func().
Question 7 :
If a base class and a derived class each include a member function with the same name, the member function of the derived class will be called by an object of the derived class
This is because the member functions are always searched in the derived class and then in the base class.
Question 8 :
The size of a derived class object is equal to the sum of sizes of data members in base class and the derived class.
Question 9 :
Private members of base class cannot be accessed by derived class member functions or objects of derived class.
Question 10 :
A class D can be derived from a class C, which is derived from a class B, which is derived from a class A.
This is known as multiple levels of inheritance.