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

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

• Question 191:

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

  #include

  using namespace std;

  int main()

  {

  int i = 0;

  do {

  i++;

  if (i==3)

  break;

  cout<

  }

  while(i < 5);

  return 0;

  }

  A. It prints: 12
  B. It prints: 1
  C. It prints: 0
  D. No output
  A. It prints: 12

• Question 192:

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

  #include

  using namespace std;

  class complex{

  double re;

  double im;

  public:

  complex() : re(0),im(0) {}

  complex(double x) { re=x,im=x;};

  complex(double x,double y) { re=x,im=y;}

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

  };

  int main(){

  complex c1;

  double i=2;

  c1 = i;

  c1.print();

  return 0; }

  A. It prints: 0 0
  B. It prints: 1 1
  C. It prints: 2 0
  D. It prints: 2 2
  D. It prints: 2 2

• Question 193:

  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
  A. It prints: ?3

  ---

  Explanation/Reference:

• Question 194:

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

  #include

  #include

  using namespace std;

  class B;

  class A {

  int age; public:

  A () { age=5; };

  friend class B;

  };

  class B {

  string name;

  public:

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

  void Print(A ob) {

  cout << name << ob.age;

  }

  };

  int main () {

  A a;

  B b;

  b.Print(a);

  return 0;

  }

  A. It prints: Bob5
  B. It prints: Bob
  C. It prints: 5
  D. None of these
  A. It prints: Bob5

  ---

  Explanation/Reference:

• Question 195:

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

  #include

  using namespace std;

  int main() {

  int i, j;

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

  for(j = i; j < i + 1; j++)

  if(j == i)

  continue;

  else

  break;

  } cout << j; return 0; }

  A. It prints: 0
  B. It prints: 3
  C. It prints: 2
  D. It prints: 1
  C. It prints: 2

• Question 196:

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

  #include

  #include

  using namespace std;

  class complex{

  double re;

  double im;

  public:

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

  bool operator==(complex andt);

  };

  bool complex::operator == (complex andt){

  if((this?>re == t.re) andand (this?>im == t.im))

  return true;

  else

  return false;

  }

  int main(){

  complex c1,c2;

  if (c1==c2)

  cout << "OK";

  else {

  cout << "ERROR";

  }

  }

  A. It prints: OK
  B. It prints: ERROR
  C. Compilation error
  D. Runtime error.
  A. It prints: OK

• Question 197:

  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=1; 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: 10
  B. It prints: 2
  C. It prints: 6
  D. It prints: 5
  A. It prints: 10

  ---

  Explanation/Reference:

• Question 198:

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

  #include

  using namespace std;

  int fun(int x) {

  return 2*x;

  }

  int main(){

  int i;

  i = fun(1) || fun(2);

  cout << i; return 0; }

  A. It prints: 0
  B. It prints: 1
  C. It prints: -1
  D. Compilation error
  B. It prints: 1

• Question 199:

  If a function, which is not a method, needs to save any value between its subsequent invocations, this can be done by: (Choose two.)

  A. setting a variable declared inside the function with the static modifier
  B. setting a parameter of the function
  C. setting a variable declared outside the function
  D. setting a variable declared inside the function without the static modifier
  A. setting a variable declared inside the function with the static modifier
  C. setting a variable declared outside the function

• Question 200:

  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, z;

  A() : x(1), y(2), z(0) {}

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

  void Print() { cout << z; }

  };

  class B : public A {

  public:

  int y;

  B() : A() {}

  B(int a, int b) : A(a,b) {}

  void Print() { cout << z; }

  };

  int main () {

  A b(2,5);

  b.Print();

  return 0;

  }

  A. It prints: 10
  B. It prints: 2
  C. It prints: 5
  D. It prints: 1
  A. It prints: 10

  ---

  Explanation/Reference: