Question

Data members ________________ (C++)

(a) Can be initialized with declaration in classes

(b) Can be initialized only with help of constructors

(c) Can be initialized either in declaration or by constructor

(d) Can’t be initialized

I had been asked this question in an internship interview.

The origin of the question is Data Members topic in section Class Members & Types of Object Oriented Programming

Answer 1

The correct choice is (b) Can be initialized only with help of constructors

The explanation: The data members are not property of class, those are property of the instances of the class. And the memory for the data members are not reserved until a constructor is called. Hence we use constructors for their initialization after the memory is reserved.