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

• Question 111:

  What is the output of the program if character "1" 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. 5.2

  B. It prints: int exception. Exception Nr. 20

  C. It prints: An exception occurred

  D. Compilation Error

  Correct Answer: B

• Question 112:

  What is the meaning of the following declaration? (Choose two.) char **ptr;

  A. ptr is a pointer to a pointer to char

  B. ptr is a pointer to char*

  C. ptr is a pointer to a pointer to a pointer to char

  D. ptr is a pointer to char

  Correct Answer: AB

• Question 113:

  What is the output of the program?

  #include

  using namespace std;

  class Base {

  static int age;

  public:

  Base () {};

  ~Base () {};

  void setAge(int a=10) {age = a;}

  void Print() { cout << age;}

  };

  int Base::age=0;

  int main () {

  Base a,*b;

  b = new Base();

  a.setAge();

  b?>setAge(20);

  a.Print();

  b?>Print();

  return 0;

  }

  A. It prints: 2020

  B. It prints: 1020

  C. It prints: 20

  D. It prints: 10

  Correct Answer: A

• Question 114:

  What is the expected result of the following program?

  

  A. It prints: 4

  B. The program enters an infinite loop

  C. It prints: 42

  D. It prints: 420

  Correct Answer: C

• Question 115:

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

  #include

  #include

  using namespace std;

  class complex{

  double re;

  double im;

  public:

  complex() : re(1),im(0.4) {}

  bool operator==(complex andt);

  };

  bool complex::operator == (complex andt){

  if((this?>re == t.re) andand (this?>im == t.im))

  return true;

  else

  return false;

  }

  int main(){

  complex c1,c2;

  if (c1==c2)

  cout << "OK";

  else {

  cout << "ERROR";

  }

  }

  A. It prints: OK

  B. It prints: ERROR

  C. Compilation error

  D. Runtime error.

  Correct Answer: A

• Question 116:

  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 117:

  What will happen if the memory cannot be allocated?

  

  A. The program will print: Standard exception

  B. The program will print: Unknown exception

  C. The program will cause a compilation error

  D. The program will print: Error allocating memory

  Correct Answer: D

• Question 118:

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

  #include

  #include

  using namespace std;

  int fun(int);

  int main()

  {

  int *x = new int;

  *x=10;

  cout << fun(*x);

  return 0;

  }

  int fun(int i)

  {

  return i*i;

  }

  A. It will print: 100

  B. It will print: 101

  C. It will print: 10

  D. It will print: 1

  Correct Answer: A

• Question 119:

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

  using namespace std;

  int min(int a, int b);

  int main()

  {

  int b=10;

  b = min(5,20);

  cout << b;

  return 0;

  }

  int min(int a, int b)

  {

  if (a

  return(a);

  else

  return(b);

  }

  A. It prints: 10

  B. It prints: 20

  C. It prints: 5

  D. It prints: 0

  Correct Answer: C

• Question 120:

  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;

  };

  class B : private A {

  string name;

  public:

  void set() {

  x = 1;

  }

  void Print() {

  cout << x;

  }

  };

  int main () {

  B b;

  b.set();

  b.Print();

  return 0;

  }

  A. It prints: 123

  B. It prints: 1

  C. It prints: ?123

  D. Compilation error

  Correct Answer: D