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

• Question 231:

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

  #include

  #include

  using namespace std;

  class A {

  public:

  A() { cout << "A no parameters";}

  A(string s) { cout << "A string parameter";}

  A(A anda) { cout << "A object A parameter";}

  };

  class B : public A {

  public:

  B() { cout << "B no parameters";}

  B(string s) { cout << "B string parameter";}

  };

  int main () {

  A a1;

  A a2("Test");

  B b1("Alan");

  return 0;

  }

  A. It prints: A no parametersA string parameterA no parametersB string parameter

  B. It prints: A no parametersB string parameter

  C. It prints: B string parameter

  D. It prints: B no parameter

  Correct Answer: A

• Question 232:

  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 {

  string z;

  public:

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

  void Print() { cout << y << A::z; }

  };

  int main () {

  B b;

  b.set();

  b.Print();

  return 0;

  }

  A. It prints: 4John

  B. It prints: 2John

  C. It prints: 23

  D. It prints: 43

  Correct Answer: D

• Question 233:

  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 :

  void print() {

  cout << "B ";

  }

  };

  int main() {

  B sc[2];

  B *bc = (B*)sc;

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

  (bc++)->print();

  return 0;

  }

  A. It prints: A A

  B. It prints: B B

  C. It prints: A B

  D. It prints: B A

  Correct Answer: B

• Question 234:

  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 : protected A {

  public:

  int y;

  using A::x;

  B(int y) {this?>y = y;}

  void Print() { cout << x << y; }

  };

  int main () {

  B b(5);

  b.Print();

  return 0;

  }

  A. It prints: 05

  B. It prints: 0

  C. It prints: 5

  D. It prints: 15

  Correct Answer: A

• Question 235:

  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 236:

  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

  Correct Answer: C

• Question 237:

  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 238:

  Which code, inserted at line 8, generates the output "100"?

  #include

  using namespace std;

  int fun(int);

  int main()

  {

  int *x = new int;

  *x=10;

  //insert code here

  return 0;

  }

  int fun(int i)

  {

  return i*i;

  }

  A. cout << fun(*x) ;

  B. cout << fun(10);

  C. cout << fun(5) ;

  D. cout << fun(y) ;

  Correct Answer: AB

• Question 239:

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

  

  A. It prints: 3

  B. It prints: 4

  C. It prints: 0

  D. It prints: 6

  Correct Answer: D

• Question 240:

  What is the output of the program?

  #include

  #include

  using namespace std;

  struct t

  {

  int tab[2];

  };

  class First

  {

  struct t u;

  public:

  First() {

  u.tab[0] = 1;

  u.tab[1] = 0;

  }

  void Print(){

  cout << u.tab[0] << " " << u.tab[1];

  }

  };

  int main()

  {

  First t;

  t.Print();

  }

  A. It prints: 2 2

  B. It prints: 1 1

  C. It prints: 1 0

  D. It prints: 0 0

  Correct Answer: C