C++ Institute C++ Certified Professional Programmer CPA Questions & Answers

• Question 1:

  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 2:

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

  #include

  #include

  using namespace std;

  int main()

  {

  string s1[]= {"How" , "to" };

  s1[0].swap(s1[1]);

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

  cout << s1[i];

  }

  return( 0 );

  }

  A. It prints: Hoto

  B. It prints: toHow

  C. It prints: Ht

  D. It prints: to

  Correct Answer: B

• Question 3:

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

  using namespace std;

  int main()

  {

  const char *s;

  char str[] = "Hello";

  s = str;

  while(*s) {

  cout << *s++;

  }

  return 0;

  }

  A. It prints: el

  B. It prints: Hello

  C. It prints: H

  D. It prints: o

  Correct Answer: B

• Question 4:

  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 5:

  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 6:

  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 7:

  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.

  Correct Answer: A

• Question 8:

  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 9:

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

  #include

  using namespace std;

  class Base {

  static int age;

  public:

  Base () {};

  ~Base () {};

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

  void Print() { cout << age;}

  };

  int Base::age=0;

  int main () {

  Base a;

  A. setAge(10);

  B. Print();

  C. setAge();

  D. Print(); return 0; }

  E. It prints: 10

  F. It prints: 20

  G. It prints: 1020

  H. It prints: 2010

  Correct Answer: C

• Question 10:

  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[0]);

  return 0;

  }

  void fun(char *a)

  {

  cout << *a;

  }

  A. It prints: 01

  B. It prints: 1

  C. It prints: 0

  D. It prints: 0123

  Correct Answer: C