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

• Question 221:

  Which code line inserted instead of the comment below will cause the program to produce the expected output?

  

  A. ob2.A::print();

  B. ob2 ?gt; A::print();

  C. ob2.B::print();

  D. ob2 ?gt; B::print();

  Correct Answer: A

• Question 222:

  Which of the following is a correct way to define the function fun() in the program below?

  #include

  #include

  #include

  using namespace std;

  int main()

  {

  int a[2][2];

  fun(a);

  return 0;

  }

  A. void fun(int *p[2]) {}

  B. void fun(int *p[2][2]) {}

  C. void fun(int *p[][2]) {}

  D. void fun(int p[][2]) {}

  Correct Answer: D

• Question 223:

  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);

  a.Print();

  a.setAge();

  a.Print();

  return 0;

  }

  A. It prints: 10

  B. It prints: 20

  C. It prints: 1020

  D. It prints: 2010

  Correct Answer: C

• Question 224:

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

  #include

  #include

  using namespace std;

  int main()

  {

  string s1[]= {"H" , "t" };

  string s;

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

  s = s1[i];

  s.insert(1,"o");

  cout << s;

  }

  return( 0 );

  }

  A. It prints: Hoto

  B. It prints: Ho

  C. It prints: to

  D. It prints: Ht

  Correct Answer: A

• Question 225:

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

  #include

  using namespace std;

  class First

  {

  public:

  virtual 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: C

• Question 226:

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

  #include

  using namespace std;

  int main()

  {

  union un

  {

  int x;

  char c;

  };

  union un u1 = {10};

  union un u2 = {'a'};

  union un u3 = {20, 'a'};

  cout<

  cout<

  cout<

  return 0;

  }

  A. It prints: 10aa

  B. It prints: 10a20a

  C. It prints: 1a

  D. Compilation error

  Correct Answer: D

• Question 227:

  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

  Correct Answer: B

• Question 228:

  Which of the following statements are true? (Choose two.)

  A. Class A's friend's friend is also a friend of class A

  B. Friendship is inherited

  C. A class may be a friend of many classes

  D. A class may have many friends

  Correct Answer: CD

• Question 229:

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

  #include

  using namespace std;

  namespace myNamespace1

  {

  int x = 5;

  int y = 10;

  }

  namespace myNamespace2

  {

  float x = 3.14;

  float y = 1.5;

  }

  int main () {

  namespace newname = myNamespace1;

  using namespace newname;

  cout << x << " ";

  cout << y;

  return 0;

  }

  A. It prints: 5 1.5

  B. It prints: 3.14 1.5

  C. It prints: 5 10

  D. It prints: 5

  Correct Answer: C

• Question 230:

  What is not inherited from the base class?

  A. constructor

  B. destructor

  C. operator=()

  D. operator+()

  Correct Answer: ABC