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

• Question 121:

  Which code, inserted at line 10, generate the output "50"?

  #include

  using namespace std;

  class Base {

  int age;

  public:

  Base () {

  age=5;

  };

  //insert code here

  void Print() { cout << age;}

  };

  void setAge(Base andob) {ob.age = 0;}

  int main () {

  Base a;

  a.Print();

  setAge(a);

  a.Print();

  return 0;

  }

  A. friend void setAge(Base ob);

  B. friend void setAge(Base *ob);

  C. friend void setAge(Base andob);

  D. None of these

  Correct Answer: C

• Question 122:

  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

• Question 123:

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

  

  A. It prints: 1

  B. It causes a compilation error

  C. It prints: -1

  D. It prints: 0

  Correct Answer: A

• Question 124:

  What is the output of the program?

  #include

  using namespace std;

  class BaseC

  {

  int i;

  public:

  BaseC() { i=?1;}

  BaseC(int i) { i=i; }

  void seti(int a) { i = a; };

  void Print() { cout << i; }

  };

  int main()

  {

  BaseC *o = new BaseC();

  o?>seti(10);

  o?>Print();

  }

  A. It prints: 10

  B. It prints: ?1

  C. It prints: 0

  D. Compilation error

  Correct Answer: A

• Question 125:

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

  

  A. It prints: 1

  B. It causes a compilation error

  C. It prints: -1

  D. It prints: 0

  Correct Answer: B

• Question 126:

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

  

  A. It prints: 5.2110.0

  B. It prints: 5.210.0

  C. It prints: 52.10

  D. It prints: 5210

  Correct Answer: C

• Question 127:

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

  

  A. It prints: 1

  B. lt prints: 2

  C. It prints: 111

  D. It prints: 121

  Correct Answer: D

• Question 128:

  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

  Correct Answer: C

• Question 129:

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

  #include

  using namespace std;

  int op(int x, int y);

  float op(int x, float y);

  int main()

  {

  int i=1, j=2, k;

  float f=0.3;

  k = op(i, j);

  cout<< k << "," << op(0, f);

  return 0;

  }

  int op(int x, int y)

  {

  return x+y;

  }

  float op(int x, float y)

  {

  return x?y;

  }

  A. It prints: 3,1

  B. It prints: 3,?0.3

  C. It prints: 3,0

  D. It prints: 0,0

  Correct Answer: B

• Question 130:

  Which code, inserted at line 10, generates the output "2?1"?

  #include

  #include

  using namespace std;

  class A {

  protected:

  int y;

  public:

  int z;

  };

  //insert code here

  public:

  void set() {

  y = 2;

  z = 3;

  }

  void Print() { cout << y << z; }

  };

  int main () {

  B b;

  b.set();

  b.z

  = ?1; b.Print(); return 0; }

  A.

  class B : private A {

  B.

  class B : public A {

  C.

  class B : protected A {

  D.

  class B {

  Correct Answer: B