C++ Institute CPA-21-02 Online Practice Questions and Exam Preparation

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

• Question 161:

  What is the output of the program given below?

  #include

  using namespace std;

  int main (int argc, const char * argv[])

  {

  int i=10;

  {

  int i=0;

  cout<

  }

  {

  i=5;

  cout << i;

  }

  cout<

  return 0;

  }

  A. 1010
  B. 101010
  C. 055
  D. None of these
  C. 055

• Question 162:

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

  

  A. It prints: 1
  B. lt prints: 2
  C. It prints: 111
  D. It prints: 121
  D. It prints: 121

• Question 163:

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

  

  A. It prints: 4
  B. It prints: 1
  C. It causes a compilation error
  D. lit prints: 0
  C. It causes a compilation error

• Question 164:

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

  class A {

  int x;

  protected:

  int y;

  public:

  int age;

  A () { age=5; };

  };

  class B : public A {

  string name;

  public:

  B () { name="Bob"; };

  void Print() {

  cout << name << age;

  }

  };

  A. public
  B. private
  C. protected
  D. None of these
  A. public

• Question 165:

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

  #include

  using namespace std;

  class A

  {

  public:

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

  };

  class B:public A

  {

  public:

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

  };

  int main()

  {

  A *obj;

  A ob1;

  obj = andob1;

  obj?>Print();

  B ob2;

  obj = andob2;

  obj?>Print();

  }

  A. It prints: AB
  B. It prints: AA
  C. It prints: BA
  D. It prints: BB
  B. It prints: AA

• Question 166:

  Point out an error in the program.

  #include

  using namespace std;

  int main()

  {

  const int x=1;

  int const *y=andx;

  cout<<*y;

  return 0;

  }

  A. No error
  B. Error: unknown pointer conversion
  C. cannot convert from 'const int *' to 'int *const'
  D. Compilation error
  A. No error

• Question 167:

  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();
  D. ob2.A::Print();

• Question 168:

  What is the output of the program if character 2 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;

  }

  }

  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. 20
  C. It prints: An exception occurred
  D. It prints: float exception. Exception Nr. 5.2
  D. It prints: float exception. Exception Nr. 5.2

• Question 169:

  Which code, inserted at line 19, generates the output "23"?

  #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 {

  string z;

  public:

  int y;

  void set() { y = 4; z = "John"; }

  void Print() {

  //insert code here

  }

  };

  int main () {

  B b;

  b.set();

  b.Print();

  return 0;

  }

  A. cout
  B. cout
  C. cout
  D. cout
  C. cout

  ---

  Explanation/Reference:

• Question 170:

  How many copies of the value member are stored in memory during program execution?

  

  A. as many as objects of the A class plus one
  B. as many as obiects of the A class and its inheritants
  C. as many as objects of the A class
  D. one
  D. one