MysteryClass-first: int-second: double;+MysteryClass()+MysteryClass(int)+MysteryClass(double) ;+MysteryClass(int, double)+setData(int, double) : void+getFirst() : int+getSecond() : double+doubleFirst() : int+squareSecond() : double+print() : void+equals(MysteryClass) : boolean+makeCopy(MysteryClass) : void+getCopy() :MysteryClassWhich of the following would be a default constructor for the class MysteryClass shown in the accompanying figure?A) public MysteryClass() { setData(0, 0.0) ; }B) public MysteryClass(0, 0.0) { setData() ; }C) public MysteryClass(0) { setData(0, 0.0) ; }D) private MysteryClass(10) { setData() ; }

Question

MysteryClass-first: int-second: double;+MysteryClass()+MysteryClass(int)+MysteryClass(double) ;+MysteryClass(int, double)+setData(int, double) : void+getFirst() : int+getSecond() : double+doubleFirst() : int+squareSecond() : double+print() : void+equals(MysteryClass) : boolean+makeCopy(MysteryClass) : void+getCopy() :MysteryClassWhich of the following would be a default constructor for the class MysteryClass shown in the accompanying figure?A)  public MysteryClass() { setData(0, 0.0) ; }B)  public MysteryClass(0, 0.0)  { setData() ; }C)  public MysteryClass(0)  { setData(0, 0.0) ; }D)  private MysteryClass(10) { setData() ; }

Joshua Burgess · Accepted Answer

Final Answer : A, Explanation :  Option A provides a default constructor that sets the initial values of the instance variables to 0 and 0.0, which is the default value for int and double respectively. This constructor calls the setData method to initialize the instance variables. Hence, option A is the correct choice for a default constructor.

Definitions

Learning Objectives

Learning Objectives

Related questions