Which of the following is true about classes and structs?
A) By default, all members of a struct are public and all members of a class are private.
B) A struct variable is passed by value only, and a class variable is passed by reference only.
C) An assignment operator is allowed on class variables, but not on struct variables.
D) You cannot use the member access specifier private in a struct.

Question

Quizplus · Accepted Answer

By default, all members of a struct are public, while all members of a class are private. However, access specifiers (public, private, protected) can be used with both structs and classes.

Answer: B
 This statement is not entirely true. Struct variables can be passed by reference, but if a struct variable is passed by value, a copy of the entire struct is passed, which can have performance implications. Class variables can also be passed by value, but doing so creates a copy of the object, which can have memory or performance implications.

Answer: C
 This statement is not true. An assignment operator can be defined for both classes and structs. In fact, by default, C++ provides a default copy constructor and assignment operator for both classes and structs.

Answer: D
 This statement is not true. The member access specifiers (private, public, protected) can be used with both structs and classes.

Which of the Following Is True About Classes and Structs