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

• Question 91:

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

  #include

  #include

  using namespace std;

  class A {

  public:

  int x;

  A() { x=0;}

  A(int x) { this?>x=x;}

  };

  class B : private A {

  public:

  using A::x;

  B() { x=1;}

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

  };

  int main () {

  B c1;

  B c2(?5);

  cout << c1.x;

  cout << c2.x;

  return 0;

  }

  A. It prints: 5

  B. It prints: 1?5

  C. It prints: 05

  D. It prints: 0

  Correct Answer: B

• Question 92:

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

  #include

  using namespace std;

  void fun(char*);

  int main()

  {

  char t[4]={'0', '1', '2', '3'};

  fun(andt[2]);

  return 0;

  }

  void fun(char *a)

  {

  cout << *a;

  }

  A. It prints: 2

  B. It prints: 21

  C. It prints: 00

  D. It prints: 02

  Correct Answer: A

• Question 93:

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

  #include

  using namespace std;

  int x=5;

  static int y;

  int i=0;

  void static myFunction()

  {

  y=x++ + ++i;

  }

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

  {

  x++;

  myFunction();

  cout<

  }

  A. Compilation fails

  B. It prints: 5 5 0

  C. It prints: 7 7 1

  D. It prints: 6 5 1

  Correct Answer: C

• Question 94:

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

  #include

  #include

  using namespace std;

  int f(int i, int b);

  int main()

  {

  int i=0;

  i++;

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

  {

  cout<

  }

  return 0;

  }

  int f(int a, int b)

  {

  return a+b;

  }

  A. It prints: 202020

  B. It prints: 012

  C. It prints: 0

  D. It prints: 2

  Correct Answer: B

• Question 95:

  Which code, inserted at line 8, generates the output "0102020"?

  #include

  using namespace std;

  static int age;

  public:

  Base () {};

  ~Base () {};

  //insert code here

  void Print() { cout << age;}

  };

  int Base::age=0;

  int main () {

  Base a,*b;

  b = new Base();

  a.Print();

  a.setAge(10);

  a.Print();

  b?>setAge();

  a.Print();

  b?>Print();

  return 0;

  }

  A. void setAge(int a) {age = a;}

  B. void setAge() {age = 20;}

  C. void setAge() {age = 10;}

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

  Correct Answer: D

• Question 96:

  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

  Correct Answer: D

• Question 97:

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

  #include

  #include

  using namespace std;

  class A {

  protected:

  int y;

  public:

  int x;

  int z;

  A() { x=2; y=2; z=3; }

  A(int a, int b) : x(a), y(b) { z = x ? y;}

  void Print() {

  cout << z;

  }

  };

  int main () {

  A a(2,5);

  a.Print();

  return 0;

  }

  A. It prints: ?3

  B. It prints: 2

  C. It prints: 6

  D. It prints: 5

  Correct Answer: A

• Question 98:

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

  #include

  #include

  using namespace std;

  inline float sum(float a,float b)

  {

  return a+b;

  }

  int main()

  {

  float a,b;

  a = 1.5; b = 3.4;

  cout<

  return 0;

  }

  A. It prints: 0

  B. It prints: 4.9

  C. It prints: 5

  D. It prints: 4

  Correct Answer: B

• Question 99:

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

  #include

  using namespace std;

  class A {

  public:

  //insert code here

  };

  class B:public A {

  public:

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

  };

  class C:public B {

  public:

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

  };

  int main()

  {

  B ob2;

  C ob3;

  A *obj;

  obj = andob1;

  obj?>Print();

  obj = andob2;

  obj?>Print();

  obj = andob3;

  obj?>Print();

  }

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

  B. virtual void Print(){ cout<<"A";}

  C. virtual void Print(string s){ cout<

  D. None of these

  Correct Answer: B

• Question 100:

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

  #include

  using namespace std;

  int main()

  {

  int i=2;

  switch(i)

  {

  case 1:

  cout<<"Hello";

  case 2:

  cout<<"world";

  case 3:

  cout<<"End";

  } return 0;

  }

  A. It prints: Hello

  B. It prints: world

  C. It prints: worldEnd

  D. It prints: End

  Correct Answer: C