QUESTION 1 An interface in C++ is a? O program that allows easy conversion of another program's data O list of argument types in a function's parameter list library for performing input and output class's public members QUESTION 2 of a class. An object is O an instance O an interface O an encapsulation O a member function QUESTION 3 How many specifiers are used to derive a class 1 O 2 O 3 4 QUESTION 4 If a class is derived privately from a base class then O no members of the base class is inherited O all members are accessible by the derived class O all the members are inherited by the class but are hidden and cannot be accessible O no derivation of the class gives an error