Which of the following are correct?

a. A constructor must be declared for each class.
b. A constructor must be declared with a return type
c. A default constructor can only be provided by the compiler.
d. A class can have only one default constructor.
e. A class can have only one constructor.

d) is the only one that is correct.
Explanation: a) is wrong. The compiler will provide a default constructor if the class author does not. b) is wrong. In fact, a constructor may not have a return type. c) is wrong. In fact, as we will see later in this course, if the class author provides a constructor, the compiler will not provide a default constructor. If default constructor is needed under these circumstances, the class author must provide one.

Computer Science & Information Technology

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