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

• Question 101:

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

  #include

  using namespace std;

  int main() {

  float i = 1.0 / 2 * 2 / 1 * 2 / 4 * 4 / 2;

  cout << i;

  return 0;

  }

  A. It prints: 0

  B. It prints: 1

  C. It prints: 2

  D. It prints: 0.5

  Correct Answer: B

• Question 102:

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

  #include

  using namespace std;

  namespace myNamespace1

  {

  int x = 5;

  int y = 10;

  }

  namespace myNamespace2

  {

  float x = 3.14;

  float y = 1.5;

  }

  int main () {

  {

  using namespace myNamespace1;

  cout << x << " ";

  }{

  using namespace myNamespace2;

  cout << y;

  }

  return 0;

  }

  A. It prints: 5 1.5

  B. It prints: 3.14 10

  C. Compilation error

  D. None of these

  Correct Answer: A

• Question 103:

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

  #include

  using namespace std;

  int main()

  {

  float x=3.5,y=1.6;

  int i,j=2;

  i = x + j + y;

  cout << i;

  return 0;

  }

  A. It prints: 7

  B. It prints: 6

  C. It prints: 7,1

  D. Compilation error

  Correct Answer: A

• Question 104:

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

  #include

  #include

  using namespace std;

  int mult(int f, int s, int t);

  int main()

  {

  cout << mult(1,2,3);

  return 0;

  }

  int mult(int f, int s, int t)

  {

  int mult_res;

  mult_res = f*s*t; return

  mult_res;

  }

  A. It prints: 0

  B. It prints: 6

  C. It prints: 2

  D. It prints: 3

  Correct Answer: B

• Question 105:

  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 A {

  public:

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

  };

  class C:public B {

  public:

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

  };

  int main()

  {

  A ob1;

  B ob2;

  C ob3;

  A *obj;

  obj = andob1;

  obj?>Print();

  obj = andob2;

  obj?>Print();

  obj = andob3;

  obj?>Print();

  }

  A. It prints: BBB

  B. It prints: AAA

  C. It prints: ABC

  D. It prints: ABB

  Correct Answer: B

• Question 106:

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

  #include

  #include

  using namespace std;

  class complex{

  double re, im;

  public:

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

  complex operator+(complex andt);

  void Print() { cout << re << " " << im; }

  };

  complex complex::operator+ (complex andt){

  complex temp;

  temp.re = this?>re + t.re;

  temp.im = this?>im + t.im;

  return temp;

  }

  int main(){

  complex c1,c2,c3;

  c3 = c1 + c2;

  c3.Print();

  }

  A. It prints: 1 0.4

  B. It prints: 2 0.8

  C. It prints: 0 0

  D. Garbage value

  Correct Answer: B

• Question 107:

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

  #include

  #include

  using namespace std;

  const int size = 3;

  class A {

  public:

  string name;

  A() { name = "Bob";}

  A(string s) { name = s;}

  A(A anda) { name = a.name;}

  };

  class B : public A {

  public:

  B() { }

  B(string s) : A(s) { }

  void Print() {

  cout << name;

  }

  };

  int main () {

  B b1("Alan");

  b1.Print();

  return 0;

  }

  A. It prints: 111Alan

  B. It prints: Bob

  C. It prints: Alan

  D. It prints: 0

  Correct Answer: C

• Question 108:

  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

  Correct Answer: B

• Question 109:

  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

  Correct Answer: D

• Question 110:

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

  #include

  using namespace std;

  class BaseC

  {

  int *ptr;

  public:

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

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

  ~BaseC() { delete ptr; }

  void Print() { cout << *ptr; }

  };

  int main()

  {

  BaseC *o = new BaseC(5);

  o?>Print();

  }

  A. It prints: 5

  B. It prints: 10

  C. It prints: 1

  D. It prints: 0

  Correct Answer: A