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) A class can have only one default constructor.

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.