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

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

• Question 91:

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

  #include

  using namespace std;

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

  {

  int x,y;

  union t

  {

  char tab[2];

  int i;

  };

  union t u;

  u.tab[0] = 1;

  u.tab[1] = 2;

  u.i

  = 0;

  x = u.tab[0];

  y = u.tab[1];

  cout << x << "," << y << "," << u.i;

  return 0;

  }

  A. compilation fails
  B. It prints: 0,0,0
  C. It prints: 1,2,0
  D. None of these
  B. It prints: 0,0,0

  ---

  Explanation/Reference:

• Question 92:

  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
  B. private

• Question 93:

  What will be the output of the program?

  #include

  #include

  using namespace std;

  int fun(int);

  int main()

  {

  float k=3;

  k = fun(k);

  cout<

  return 0;

  }

  int fun(int i)

  {

  i++;

  return i;

  }

  A. 3
  B. 5
  C. 4
  D. 5
  C. 4

• Question 94:

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

  #include

  using namespace std;

  class Base {

  int age;

  public:

  class C {

  int b;

  void PrintC() { cout << b; }

  };

  Base () {age=5;};

  void setAge(int a=20) {age = a;}

  void Print() { cout << age;}

  };

  int main () {

  Base a;

  a.setAge(10);

  a.Print();

  return 0;

  }

  A. It prints: 1020
  B. It prints: 105
  C. It prints: 10
  D. It prints: 20
  C. It prints: 10

  ---

  Explanation/Reference:

• Question 95:

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

  #include

  using namespace std;

  class A {

  public:

  int x;

  A() { x=0;}

  };

  class B : public A {

  public:

  B() { x=1;}

  };

  class C : private B {

  public:

  C() { x=2;}

  };

  int main () {

  C c1;

  cout << c1.x;

  return 0;

  }

  A. It prints: 210
  B. It prints: 110
  C. It prints: 010
  D. Compilation error
  D. Compilation error

• Question 96:

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

  #include

  using namespace std;

  struct {

  int x;

  char c;

  union {

  float f;

  int i;

  };

  } s;

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

  {

  s.x=10;

  s.i=0;

  cout << s.i << " " << s.x;

  }

  A. It prints: 0 10
  B. It prints: 11
  C. Compilation error
  D. None of these
  A. It prints: 0 10

  ---

  Explanation/Reference:

• Question 97:

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

  

  A. It causes a compilation error
  B. It prints: Tesc failed
  C. .It prints: failed
  D. It prints: Tesc
  D. It prints: Tesc

• Question 98:

  Which statement should be added in the following program to make work it correctly?

  using namespace std;

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

  {

  cout<<"Hello";

  }

  A. #include
  B. #include
  C. #include
  D. #include
  C. #include

• Question 99:

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

  #include

  using namespace std;

  int main()

  {

  int x=2, *y, z=3;

  y = andz;

  cout<

  return 0;

  }

  A. It prints: 36
  B. It prints: 14
  C. It prints: 16
  D. Compilation error
  D. Compilation error

• Question 100:

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

  

  A. It prints: BAD
  B. It prints: BACD
  C. It prints: ABCD
  D. It prints: BAC
  B. It prints: BACD