C++ Institute C++ Certified Professional Programmer CPA Questions & Answers

• Question 21:

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

  #include

  using namespace std;

  int main()

  {

  int a=5;

  cout << ((a < 5) ? 9.9 : 9);

  }

  A. It prints: 9

  B. It prints: 9.9

  C. Compilation error

  D. None of these

  Correct Answer: A

• Question 22:

  Which code, inserted at line 18, generates the output "AB"

  #include

  using namespace std;

  class A

  {

  public:

  void Print(){ cout<< "A";}

  void Print2(){ cout<< "a";}

  };

  class B:public A

  {

  public:

  void Print(){ cout<< "B";}

  void Print2(){ cout<< "b";}

  };

  int main()

  {

  B ob2;

  //insert code here

  ob2.Print();

  }

  A. ob2?>A::Print();

  B. ob2.B::Print();

  C. ob2?>B::Print();

  D. ob2.A::Print();

  Correct Answer: D

• Question 23:

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

  #include

  #include

  using namespace std;

  class A {

  protected:

  int y;

  public:

  int x, z;

  A() : x(1), y(2), z(0) {}

  A(int a, int b) : x(a), y(b) { z = x * y;}

  void Print() { cout << z; }

  };

  class B : public A {

  public:

  int y;

  B() : A() {}

  B(int a, int b) : A(a,b) {}

  void Print() { cout << z; }

  };

  int main () {

  A b(2,5);

  A. Print(); return 0; }

  B. It prints: 10

  C. It prints: 2

  D. It prints: 5

  E. It prints: 1

  Correct Answer: A

• Question 24:

  What is the output of the program?

  #include

  using namespace std;

  #define PRINT(i) cout<

  int main()

  {

  int y=2, z=3;

  PRINT(y);

  PRINT(z);

  return 0;

  }

  A. It prints: 123

  B. It prints: 23

  C. It prints: 3

  D. It prints: 2

  Correct Answer: B

• Question 25:

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

  #include

  using namespace std;

  int main()

  {

  int i=5;

  switch(i)

  {

  case 1:

  cout<<"Hello";

  break;

  case 2:

  cout<<"world";

  break;

  case 3:

  break;

  default:

  cout<<"End";

  }

  return 0;

  }

  A. It prints: Hello

  B. It prints: world

  C. It prints: End

  D. It prints: Helloworld

  Correct Answer: C

• Question 26:

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

  #include

  using namespace std;

  int main()

  {

  int *a= new int;

  *a=100;

  cout << *a;

  delete a;

  }

  A. It prints: 1

  B. It prints: 100

  C. It prints: 0

  D. It prints: 10

  Correct Answer: B

• Question 27:

  Which of the following operations is INCORRECT?

  A. int i=15;

  B. long int k=123

  C. float f=12,2;

  D. double d=12;

  Correct Answer: C

• Question 28:

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

  #include

  #include

  using namespace std;

  class A {

  protected:

  int y;

  public:

  int x,z;

  A() : x(2), y(2), z(1) { z = x + y; }

  A(int a, int b) : x(a), y(b) { z = x + y;}

  void Print() { cout << z; }

  };

  class B : public A {

  public:

  int y;

  B() : A() {}

  B(int a, int b) : A(a,b) {}

  void Print() { cout << z; }

  };

  int main () {

  A b;

  A. Print(); return 0; }

  B. It prints: 4

  C. It prints: 0

  D. It prints: 3

  E. It prints: 2

  Correct Answer: A

• Question 29:

  What is the output of the program if character 3 is supplied as input?

  #include

  using namespace std;

  int main () {

  int c;

  cin >> c;

  try

  {

  switch (c)

  {

  case 1:

  throw 20;

  case 2:

  throw 5.2f;

  case 3:

  throw 'a';

  }

  }

  catch (int e)

  { cout << "int exception. Exception Nr. " << e; }

  catch (float e)

  { cout << "float exception. Exception Nr. " << e; }

  catch (...)

  { cout << "An exception occurred."; }

  return 0;

  }

  A. It prints: float exception. Exception Nr.

  B. It prints: int exception. Exception Nr.

  C. It prints: An exception occurred.

  D. It prints: float exception. Exception Nr.

  Correct Answer: C

• Question 30:

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

  #include

  #include

  using namespace std;

  class A {

  int x;

  protected:

  int y;

  public:

  int z;

  A() { x=1; y=2; z=3; }

  };

  class B : public A {

  public:

  void set() {

  y = 4; z = 2;

  }

  void Print() {

  cout << y << z;

  }

  };

  int main () {

  B b;

  A. set();

  B. Print(); return 0; }

  C. It prints: 42

  D. It prints: 44

  E. It prints: 22

  F. It prints: 2

  Correct Answer: A