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

• Question 81:

  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) { z = x + y; }

  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;

  b.Print();

  return 0;

  }

  A. It prints: 3

  B. It prints: 0

  C. It prints: 1

  D. It prints: 2

  Correct Answer: A

• Question 82:

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

  #include

  #include

  using namespace std;

  float* sum(float a,float b);

  float* sum(float a,float b)

  {

  float *f = new float;

  *f = a+b;

  return f;

  }

  int main()

  {

  float a,b,*f;

  a = 1.5; b = 3.4;

  f = sum(a,b);

  cout<<*f;

  return 0;

  }

  A. It prints: 0

  B. It prints: 4.9

  C. It prints: 5

  D. It prints: 4

  Correct Answer: B

• Question 83:

  What is the output of the program given below?

  #include

  using namespace std;

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

  {

  int i=10;

  {

  int i=0;

  cout<

  }

  {

  i=5;

  cout << i;

  }

  cout<

  return 0;

  }

  A. 1010

  B. 101010

  C. 055

  D. None of these

  Correct Answer: C

• Question 84:

  Which of the structures is incorrect?

  1: struct s1{ int x; long int li; }; 2: struct s2{ float f; struct s2 *s; };

  3:

  struct s3{ float f; struct s3 s; };

  A.

  1

  B.

  2

  C.

  3

  D.

  2, 3

  Correct Answer: C

• Question 85:

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

  #include

  using namespace std;

  int main()

  {

  const int x=0;

  const int *ptr;

  ptr = andx;

  cout<<*ptr;

  return 0;

  }

  A. It prints: 0

  B. It prints address of x

  C. It prints: 1

  D. Compilation error

  Correct Answer: A

• Question 86:

  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) and fun(0);

  cout << i;

  return 0;

  }

  A. It prints: 0

  B. It prints: 1

  C. It prints: -1

  D. Compilation error

  Correct Answer: A

• Question 87:

  What is the output of the program?

  #include

  #include

  using namespace std;

  class First

  {

  string name;

  public:

  First() {

  name = "Alan";

  }

  cout << name;

  }

  };

  int main()

  {

  First ob1,*ob2;

  ob2 = new First();

  ob1.Print();

  ob2?>Print();

  }

  A. Garbage value

  B. It prints: AlanAlan

  C. It prints: Alan

  D. It prints: Al

  Correct Answer: B

• Question 88:

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

  #include

  using namespace std;

  int fun(int x);

  int main() {

  cout << fun(0);

  }

  int fun(int x) {

  if(x > 0)

  return fun(x-1);

  else

  return 100;

  }

  A. It prints: 0

  B. It prints: 10

  C. It prints: 100

  D. It prints: -1

  Correct Answer: C

• Question 89:

  What will the variable "age" be in class B?

  class A {

  int x;

  protected:

  int y;

  public:

  int age;

  };

  class B : protected A {

  string name;

  public:

  void Print() {

  cout << name << age;

  }

  };

  A. public

  B. private

  C. protected

  D. None of these

  Correct Answer: C

• Question 90:

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

  #include

  #include

  using namespace std;

  class A {

  public:

  A() { cout << "A no parameters";}

  A(string s) { cout << "A string parameter";}

  A(A anda) { cout << "A object A parameter";}

  };

  class B : public A {

  public:

  B() { cout << "B no parameters";}

  B(string s) { cout << "B string parameter";}

  B(int s) { cout << "B int parameter";}

  };

  int main () {

  A a2("Test");

  B b1(10);

  B b2(b1);

  return 0;

  }

  A. It prints: A no parametersA no parametersB string parameter

  B. It prints: A string parameterA no parametersB int parameterA object A parameter

  C. It prints: A no parametersB string parameter

  D. It prints: A no parametersA no parameters

  Correct Answer: B