UGC NET CSE | December 2008 | Part 2 | Question: 27

Question

A copy constructor is invoked when :

• A. a function returns by value        
• B. an argument is passed by value
• C. a function returns by reference 
• D. none of the above

Comments

Is it option d) ?

Answer 1

In C++, a Copy Constructor may be called in following cases:
1. When an object of the class is returned by value.
2. When an object of the class is passed (to a function) by value as an argument.
3. When an object is constructed based on another object of the same class.
4. When compiler generates a temporary object.

 

Hence, ans B