C++ Institute CPA-21-02 Online Practice Questions and Exam Preparation

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

• Question 1:

  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
  A. It prints: 0

• Question 2:

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

  #include

  using namespace std;

  #define FUN(arg) if(arg) cout<<"Test";

  int main()

  {

  int i=1;

  FUN(i<3);

  return 0;

  }

  A. It prints: 0
  B. It prints: T
  C. It prints: T0
  D. It prints: Test
  D. It prints: Test

• Question 3:

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

  #include

  #include

  using namespace std;

  int f(int i, int b);

  int main()

  {

  int i=0;

  i++;

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

  {

  cout<

  }

  return 0;

  }

  int f(int a, int b)

  {

  return a+b;

  }

  A. It prints: 202020
  B. It prints: 012
  C. It prints: 0
  D. It prints: 2
  B. It prints: 012

• Question 4:

  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
  B. It prints: from Firstfrom First

• Question 5:

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

  #include

  #include

  using namespace std;

  class myClass : public exception

  {

  virtual const char* what() const throw()

  {

  return "My exception.";

  }

  } obj;

  int main () {

  try

  {

  throw obj;

  }

  catch (exceptionand e)

  {

  cout << e.what() << endl;

  }

  return 0;

  }

  A. It prints: My exception.
  B. It prints: 0
  C. It prints: 1
  D. Compilation error
  A. It prints: My exception.

• Question 6:

  What will happen 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;

  *s++;

  }

  return 0;

  }

  A. It will print:"el "
  B. The code will not compile.
  C. It will print:"Hello "
  D. It will print garbage value
  A. It will print:"el "

• Question 7:

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

  #include

  using namespace std;

  int main()

  {

  int i=5;

  switch(i)

  {

  case 1:

  cout<<"Hello";

  break;

  case 2:

  cout<<"world";

  break;

  case 3:

  break;

  default:

  cout<<"End";

  }

  return 0;

  }

  A. It prints: Hello
  B. It prints: world
  C. It prints: End
  D. It prints: Helloworld
  C. It prints: End

• Question 8:

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

  #include

  using namespace std;

  int x=5;

  static int y=0;

  void myFunction(int a)

  {

  y=++a;

  }

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

  {

  int i=0;

  myFunction(i);

  cout<

  }

  A. It prints: 0 5
  B. It prints: 5 1
  C. It prints: 1 5
  D. It prints: 5 0
  C. It prints: 1 5

• Question 9:

  What is the output of the program?

  #include

  using namespace std;

  class Base {

  static int age;

  public:

  Base () {};

  ~Base () {};

  void setAge(int a=10) {age = a;}

  void Print() { cout << age;}

  };

  int Base::age=0;

  int main () {

  Base a,*b;

  b = new Base();

  a.setAge();

  b?>setAge(20);

  a.Print();

  b?>Print();

  return 0;

  }

  A. It prints: 2020
  B. It prints: 1020
  C. It prints: 20
  D. It prints: 10
  A. It prints: 2020

  ---

  Explanation/Reference:

• Question 10:

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

  ---

  Explanation/Reference: