Question

Copy constructors can be called implicitly on assignment, and when a function parameter is passed by value.

a. True
b. False

Answer 1

Copy constructors are called in three main scenarios in C++, but not on assignment; instead, the copy assignment operator is used. Hence, the statement is false.

Step-by-step explanation:

The statement that copy constructors can be called implicitly on assignment, and when a function parameter is passed by value, is false. In C++ programming, a copy constructor is called in three specific scenarios: when an object is initialized with another object of the same type, when an object is passed by value to a function, and when an object is returned by value from a function.

However, for assignment, the copy assignment operator is used, not the copy constructor. The copy constructor and the copy assignment operator have different roles, and one cannot substitute for the other. It's important to distinguish between initialization, which can invoke the copy constructor, and assignment, which invokes the copy assignment operator if one is provided.