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Constructors and Destructors - C++ Programming Questions and Answers

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Constructors and Destructors - Programs
  1. p>What will be the output of the following program? 

    #include<iostream.h> 
class FresherGate
{
    int x; 
    public:
    FresherGate(int xx, float yy)
    {
        cout<< char(yy);
    } 
}; 
int main()
{
    FresherGate *p = new FresherGate(35, 99.50f);
    return 0; 
}

    2. A.

    99
    B.

    ASCII value of 99
    C.

    Garbage value
    D.

    99.50

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  2. Which of the following statement is correct about the program given below?

    #include 
 class Freshergate
{     public:    
      Freshergate()   
  {        
      cout"Fresher";   
  }    
 ~Freshergate()    
  {       
      cout"GATE";    
  } 
}; 
int main() 
{    
 Freshergate objGATE;    
   return 0;  
}

    3. A.

    The program will print the output Fresher.
    B.

    The program will print the output GATE.
    C.

    The program will print the output FresherGATE
    D.

    The program will report compile time error.

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  3. Which of the following statement is correct about the program given below?

     #include 
 class GATE
 {    
     int x;   
   public:     
     GATE();   
    ~GATE();      
     void Show() const;
 };
 GATE:GATE()
 {   
    x = 25; 
 }
 void GATE::Show() const 
 {    
    coutint main() 
 {    
      GATE objB;   
      objB.Show();    
      return 0;  
 }

    4. A.

    The program will print the output 25.
    B.

    The program will print the output Garbage-value.
    C.

    The program will report compile time error.
    D.

    The program will report runtime error.

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  4. Which of the following statement is correct about the program given below?

       #include
   class GATE
   {    
        int x;    
  public:     
        GATE();     
        void Show() const;       
       ~GATE(){}
 }; 
 GATE::GATE()
 {   
     x = 5; 
 }
 void GATE::Show() const 
 { 
     coutint main()
 {     
     GATE objB;  
     objB.Show();   
     return 0;  
 }

    5. A.

    The program will print the output 5.
    B.

    The program will print the output Garbage-value.
    C.

    The program will report compile time error.
    D.

    The program will report runtime error.

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  5. #include 
int val = 0; 
class Freshergate
{
    public: 
    Freshergate()
    {
        cout
    6. A.

    1234
    B.

    4321
    C.

    12344321
    D.

    12341234
    E.

    43211234

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  6. Which of the following constructor is used in the program given below?

     #include 
 class Freshergate
 {   
      int x, y;
      public:    
      FresherGATE(int xx = 10, int yy = 20 )  {     
         x = xx;    
         y = yy;   
      }   
      void Display()   
      {      
         cout" " int main() 
 {   
    Freshergate objGATE;      
    objGATE.Display(); 
    return 0;
 }

    7. A.

    Copy constructor
    B.

    Simple constructor
    C.

    Non-parameterized constructor
    D.

    Default constructor

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  7. What will be the output of the following program?

     #include
  class Freshergate
  {    
      public:  
      GATEBase()    
      {      
         cout"Base OK. ";    
      } 
  };
  class GATEDerived: public GATEBase 
  { 
      public: 
      GATEDerived()    
     {         
        cout"Derived OK. ";   
     }   
     ~BixDerived()     
     {      
          cout"Derived DEL. ";
      }
 };
 int main()
 {    
     GATEBase    objB;  
     GATEDerived objD;      
     objD.~GATEDerived(); 
     return 0; 
}

     

    8. A.

    Base OK. Derived OK. Derived DEL.
    B.

    Base OK. Base OK. Derived OK. Derived DEL.
    C.

    Base OK. Derived OK. Derived DEL. Derived DEL.
    D.

    Base OK. Base OK. Derived OK. Derived DEL. Derived DEL.
    E.

    The program will report compile time error.

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  8. What will be the output of the following program?

     #include 
  class Freshergate
  {    
     int x, y;     
     public:     
     Freshergate(int xx)    
     {        
         x = ++xx;     
     }     
    ~Freshergate()     
     {        
         cout1 " ";     
     }
     void Display()     
     {        
         cout1 " ";  
     }  
  };
  int main() 
  {     
       Freshergate objGate(5);   
       objGate.Display();    
       int *p = (int*) &objGate;   
       *p = 40;     
        objGate.Display();    
        return 0; 
  }

     

    9. A.

    6 6 4
    B.

    6 6 5
    C.

    5 40 38
    D.

    6 40 38
    E.

    6 40 39

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  9. Which of the following statement is correct about the program given below?

     #include 
  class Freshergate
  {   
     int x;    
     public:   
     FresherGate(short ss)  
     {       
        cout"Short" int xx) 
     {     
         cout"Int" (char ch)    
     {        
         cout"Char" cout"Final";  
     } 
 }; 
 int main() 
 {    
     FresherGate *ptr = new FresherGate('B');    
     return 0;
 }

    10. A.

    The program will print the output Short .
    B.

    The program will print the output Int .
    C.

    The program will print the output Char .
    D.

    The program will print the output Final .
    E.

    None of the above

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  10. Which of the following statement is correct about the program given below?

      #include 
   class FresherGate
   {
       int x;    
       public:    
       FresherGate(short ss)    
  {        
     cout"Short" int xx)     
  {         
     cout"Int" float ff)     
  {
      cout"Float" cout"Final"; 
  }
}; 
int main() 
{   
     FresherGate *ptr = new FresherGate('B');     
     return 0; 
}

    11. A.

    The program will print the output Short .
    B.

    The program will print the output Int .
    C.

    The program will print the output Float .
    D.

    The program will print the output Final .
    E.

    None of the above

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