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

• Question 201:

  If there is one, point out an error in the program

  #include

  using namespace std;

  int main()

  {

  int c = 'a';

  switch(i)

  {

  case '2':

  cout<<"OK";

  case '1':

  cout<<"Error";

  default:

  break;

  }

  return 0;

  }

  A. No Error

  B. Use of undeclared identifier 'i'

  C. Illegal use of 'continue'

  D. Illegal use of 'break'

  Correct Answer: B

• Question 202:

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

  

  A. It prints: 3.14

  B. It prints: Scring

  C. It causes a compilation error

  D. It prints: x

  Correct Answer: D

• Question 203:

  Which of the following expressions decrement variable i by 2? (Choose two.)

  A. i and= 0x03;

  B. i ? 2;

  C. i; i

  　　;

  D. i

  　　;

  Correct Answer: BC

• Question 204:

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

  #include

  #include

  using namespace std;

  int f(int i);

  int main()

  {

  int i=0;

  i++;

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

  {

  cout<

  }

  return 0;

  }

  int f(int a)

  {

  return a+a;

  }

  A. It prints: 202020

  B. It prints: 012

  C. It prints: 024

  D. It prints: 0

  Correct Answer: C

• Question 205:

  What will variable "y" be in class B?

  class A {

  int x;

  protected:

  int y;

  public:

  int age;

  };

  class B : public A {

  string name;

  public:

  void Print() {

  cout << name << age;

  }

  };

  A. public

  B. private

  C. protected

  D. None of these

  Correct Answer: C

• Question 206:

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

  #include

  using namespace std;

  class First

  {

  public:

  void Print(){ cout<<"from First";}

  };

  class Second:public First

  {

  public:

  void Print(){ cout<< "from Second";}

  };

  void fun(First *obj);

  int main()

  {

  First FirstObject; fun(andFirstObject); Second SecondObject; fun(andSecondObject);

  } void fun(First *obj) { obj?>Print(); }

  A. It prints: from First

  B. It prints: from Firstfrom First

  C. It prints: from Firstfrom Second

  D. It prints: from Secondfrom Second

  Correct Answer: B

• Question 207:

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

  #include

  using namespace std;

  #define A 1

  int main()

  {

  #if A

  cout<<"Hello";

  #endif

  cout<<"world";

  return 0;

  }

  A. It will print: Helloworld

  B. It will print: Hello

  C. It will print: world

  D. It will print: 0

  Correct Answer: A

• Question 208:

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

  #include

  using namespace std;

  int main()

  {

  int i = 4;

  while(i >= 0) {

  cout<

  i??;

  }

  return 0;

  }

  A. It prints:"43210"

  B. It prints:"3210"

  C. It prints: "3210?1"

  D. None of these

  Correct Answer: A

• Question 209:

  What will be the output of the program?

  #include

  using namespace std;

  int main()

  {

  const int y = 5;

  const x = ?10;

  cout<

  return 0;

  }

  A. ?10 5

  B. 5 ?10

  C. Compilation error

  D. None of these

  Correct Answer: C

• Question 210:

  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(0.3) {}

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

  complex(int m,int n) { re=m,im=n;}

  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(1),c2(2),c3;

  c3 = c1 + c2;

  c3.Print();

  }

  A. It prints: 1 1.5

  B. It prints: 2 1.5

  C. It prints: 3 3

  D. It prints: 0 0

  Correct Answer: C