C++ Institute C++ Institute Certifications CPA-21-02 Questions & Answers

• Question 61:

  What happens when you attempt to compile and run the following code?

  #include

  using namespace std;

  class complex{

  double re;

  double im;

  public:

  complex() : re(0),im(0) {}

  complex(double x) { re=x,im=x;};

  complex(double x,double y) { re=x,im=y;}

  void print() { cout << re << " " << im;}

  };

  int main(){

  complex c1;

  double i=2;

  c1 = i;

  c1.print();

  return 0; }

  A. It prints: 0 0

  B. It prints: 1 1

  C. It prints: 2 0

  D. It prints: 2 2

  Correct Answer: D

• Question 62:

  What happens when you attempt to compile and run the following code? #include

  #include

  using namespace std;

  class A {

  public:

  int x;

  };

  class B : public A {

  public:

  B() { x=1;}

  B(int x) {this?>x = x;}

  };

  int main () {

  B c1;

  B c2(10);

  cout << c1.x;

  cout << c2.x;

  return 0;

  }

  A. It prints: 010

  B. It prints: 110

  C. It prints: 00

  D. It prints: 1

  Correct Answer: B

• Question 63:

  What happens when you attempt to compile and run the following code?

  #include

  #include

  using namespace std;

  class myClass : public exception

  {

  virtual const char* what() const throw()

  {

  return "My exception.";

  }

  } obj;

  int main () {

  try

  {

  throw obj;

  }

  catch (exceptionand e)

  {

  cout << e.what() << endl;

  }

  return 0;

  }

  A. It prints: My exception.

  B. It prints: 0

  C. It prints: 1

  D. Compilation error

  Correct Answer: A

• Question 64:

  What will the variable "age" be in class B?

  class A {

  int x;

  protected:

  int y;

  public:

  int age;

  };

  class B : private A {

  string name;

  public:

  void Print() {

  cout << name << age;

  }

  };

  A. public

  B. private

  C. protected

  D. None of these

  Correct Answer: B

• Question 65:

  What happens when you attempt to compile and run the following code?

  #include

  using namespace std;

  class First

  {

  public:

  void Print(){ cout<<"from First";}

  };

  class Second

  {

  public:

  void Print(){ cout<< "from Second";}

  };

  int main()

  {

  First FirstObject;

  FirstObject.Print();

  Second SecondObject;

  SecondObject.Print();

  }

  A. It prints: from First

  B. It prints: from Firstfrom First

  C. It prints: from Firstfrom Second

  D. It prints: from Secondfrom Second

  Correct Answer: C

• Question 66:

  What happens when you attempt to compile and run the following code?

  #include

  using namespace std;

  int main()

  {

  int x=20;

  int *ptr;

  ptr = andx;

  cout<<*ptr;

  return 0;

  }

  A. It prints: 20

  B. It prints: 0

  C. It prints address of ptr

  D. It prints: 2

  Correct Answer: A

• Question 67:

  What will be the output of the program?

  #include

  using namespace std;

  int fun(int);

  int main()

  {

  cout << fun(5);

  return 0;

  }

  int fun(int i)

  {

  return i*i;

  }

  A. 25

  B. 5

  C. 0

  D. 1

  Correct Answer: A

• Question 68:

  What happens when you attempt to compile and run the following code?

  #include

  class complex{

  double re;

  double im;

  public:

  complex() : re(0),im(0) {}

  complex(double x) { re=x,im=x;};

  complex(double x,double y) { re=x,im=y;}

  void print() { cout << re << " " << im;}

  };

  int main(){

  complex c1(1,2);

  c1.print();

  return 0;

  }

  A. It prints: 1 0

  B. It prints: 1 1

  C. It prints: 1 2

  D. Compilation error

  Correct Answer: C

• Question 69:

  What happens when you attempt to compile and run the following code?

  #include

  using namespace std;

  class Test {

  float i,j;

  };

  class Add {

  public:

  int x,y;

  Add (int a=3, int b=3) { x=a; y=b; }

  int result() { return x+y;}

  };

  int main () {

  Test test;

  Add * padd;

  padd = andtest;

  cout << padd?>result();

  return 0;

  }

  A. It prints: 6

  B. It prints: 9

  C. Compilation error

  D. It prints: 33

  Correct Answer: C

• Question 70:

  What is the output of the program?

  #include

  #include

  using namespace std;

  int main()

  {

  string s1[]= {"Hello" , "World" };

  for (int i=0; i<2; i++) {

  cout << s1[i];

  }

  return( 0 );

  }

  A. It prints: HelloWorld

  B. It prints: Hello

  C. It prints: WorldHello

  D. It prints: World

  Correct Answer: A