To answer this question, you need to understand the concept of constructor functions in object-oriented programming.
In object-oriented programming, a constructor function is a special method that is used to initialize objects of a class. It is called automatically when an object is created from the class.
In many programming languages, including Java and C++, if a class does not explicitly define a constructor function, a default constructor is automatically provided by the compiler. This default constructor initializes the object with default values or performs any necessary setup for the object.
Therefore, even when a constructor function is not explicitly declared in a class, a default constructor is still present. So, the statement "Every class has at least one constructor function, even when none is declared" is true.
Option A) True - This option is correct because, as explained above, every class has at least one constructor function, even if none is explicitly declared.
Option B) False - This option is incorrect because, as explained above, even when no constructor function is declared, a default constructor is still present.
The correct answer is A) True. This option is correct because every class has at least one constructor function, even when none is declared.