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

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

• Question 231:

  Which code, inserted at line 15, generates the output "5 Bob"?

  #include

  using namespace std;

  class B;

  class A {

  int age;

  public:

  A () { age=5; };

  friend void Print(A andob, B andso);

  };

  class B {

  string name;

  public:

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

  //insert code here

  };

  void Print(A andob, B andso) {

  cout<

  }

  int main () {

  A a;

  B b;

  Print(a,b);

  return 0;

  }

  A. friend void Print(A ob, B so);
  B. friend void Print(A andob, B andso);
  C. friend void Print(A *ob, B *so);
  D. None of these
  B. friend void Print(A andob, B andso);

• Question 232:

  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
  A. It prints: 9

• Question 233:

  Which of the following statements may completely ignore their bodies (inner statements)? (Choose three.)

  A. do
  B. swicch
  C. for
  D. while
  B. swicch
  C. for
  D. while

• Question 234:

  What is the expected output of the following program?

  

  A. It prints: 432
  B. It prints: 321
  C. It prints: 4321
  D. It prints: 3210
  B. It prints: 321

• Question 235:

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

  #include

  #include

  #include

  using namespace std;

  int main(void)

  {

  string s;

  s = "Test";

  s.resize (s.size() ? 1);

  cout<

  return 0;

  }

  A. It prints: Test 4
  B. It prints: Test 3
  C. Compilation error
  D. It prints: Tes 3
  D. It prints: Tes 3

  ---

  Explanation/Reference:

• Question 236:

  What is the output of the program?

  #include

  #include

  using namespace std;

  struct Person {

  int age;

  };

  class First

  {

  Person *person;

  public:

  First() {person = new Person;

  person?>age = 20;

  }

  void Print(){

  cout << person?>age;

  }

  };

  int main()

  {

  First t[2];

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

  t[i].Print();

  }

  A. It prints: 10
  B. It prints: 2020
  C. It prints: 22
  D. It prints: 00
  B. It prints: 2020

• Question 237:

  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
  C. It prints: 5

• Question 238:

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

  #include

  using namespace std;

  class BaseC

  {

  public:

  int *ptr;

  BaseC() { ptr = new int(10);}

  BaseC(int i) { ptr = new int(i); }

  ~BaseC() { delete ptr; }

  };

  void fun(BaseC x);

  int main()

  {

  BaseC *o = new BaseC(5);

  fun(*o);

  }

  void fun(BaseC x) {

  cout << "Hello:"<<*x.ptr;

  }

  A. It prints: Hello:50
  B. It prints: Hello:10
  C. It prints: Hello:5
  D. Compilation error
  C. It prints: Hello:5

• Question 239:

  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()

  {

  Second t[2];

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

  t[i].Print();

  }

  A. It prints: from First
  B. It prints: from Firstfrom First
  C. It prints: from Secondfrom Second
  D. It prints: from Second
  C. It prints: from Secondfrom Second

• Question 240:

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

  #include

  using namespace std;

  int s(int n);

  int main()

  {

  int a;

  a = 3;

  cout << s(a);

  return 0;

  }

  int s(int n)

  {

  if(n == 0) return 1;

  return s(n?1)*n;

  }

  A. It prints: 4
  B. It prints: 6
  C. It prints: 3
  D. It prints: 0
  B. It prints: 6