Which of the following is NOT an accurate comparison between call-by-value and const call-by-reference Call-by-value copies the argument whereas const call-by reference does not Both protect against changing the caller's argument. Call by value uses more memory than const call-by-reference in making the copy. Both are very fast for all sizes of objects. Which of the following is incorrect regarding pretence and behavior of constructor is correct. Assume that the class name is C An explicit call to a constructor creates an anonymous object, which can be assigned. A constructor is called automatically when you declare an object of class type, but any constructor can be called after declaration to set all the member variables to a known state. To use the declaration. C x; requires a default constructor must be present. To invoke the default constructor, the syntax must be C x(); Which of the following is correct? A class can have only one default constructor A constructor must be declared with a return type A default constructor can only be provided by the compiler A constructor must be declared for each class