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

• Question 31:

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

  #include

  #include

  using namespace std;

  int f(int i);

  int main()

  {

  int i=0;

  i++;

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

  {

  cout<

  }

  return 0;

  }

  int f(int a)

  {

  return a+a;

  }

  A. It prints: 202020

  B. It prints: 012

  C. It prints: 024

  D. It prints: 0

  Correct Answer: C

• Question 32:

  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];

  A. insert(1,"o"); cout << s; } return( 0 ); }

  B. It prints: Hoto

  C. It prints: Ho

  D. It prints: to

  E. It prints: Ht

  Correct Answer: A

• Question 33:

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

  #include

  using namespace std;

  int min(int a, int b);

  int main()

  {

  int b=10;

  b = min(5,20);

  cout << b;

  return 0;

  }

  int min(int a, int b)

  {

  if (a

  return(a);

  else

  return(b);

  }

  A. It prints: 10

  B. It prints: 20

  C. It prints: 5

  D. It prints: 0

  Correct Answer: C

• Question 34:

  Which code, inserted at line 19, generates the output "23"? #include

  #include

  using namespace std;

  class A {

  int x;

  protected:

  int y;

  public:

  int z;

  A() { x=1; y=2; z=3; }

  };

  class B : public A {

  string z;

  public:

  int y;

  void set() { y = 4; z = "John"; }

  void Print() {

  //insert code here

  }

  };

  int main () {

  B b;

  A. set();

  B. Print(); return 0; }

  C. cout << y << z;

  D. cout << y << A::z;

  E. cout << A::y << A::z;

  F. cout << B::y << B::z;

  Correct Answer: C

• Question 35:

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

  #include

  using namespace std;

  int mul (int a, int b=2)

  {

  int r;

  r=a*b;

  return (r);

  }

  int main ()

  {

  cout << mul(1) << mul(2,4);

  return 0;

  }

  A. It prints: 2

  B. It prints: 28

  C. It prints: 8

  D. It prints: 6

  Correct Answer: B

• Question 36:

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

  #include

  using namespace std;

  class SampleClass

  {

  string *s;

  public:

  SampleClass() { s = new string("Text");}

  SampleClass(string s) { this?>s = new string(s);}

  ~SampleClass() { delete s;}

  void Print(){ cout<<*s;}

  };

  int main()

  {

  SampleClass *obj;

  obj = new SampleClass("Test");

  obj?>Print();

  }

  A. It prints: Text

  B. It prints: Test

  C. It prints: TextTest

  D. Garbage value.

  Correct Answer: B

• Question 37:

  What happens if characters 'w', 'o', 'r', 'l' and 'd' are entered as input?

  #include

  #include

  using namespace std;

  int main()

  {

  string s1 = "Hello";

  string s2;

  getline( cin, s2 );

  cout << s1 + s2;

  return( 0 );

  }

  A. It prints: Helloworld

  B. It prints: Hello

  C. It prints: world

  D. Compilation error

  Correct Answer: A

• Question 38:

  What is the output of the program?

  #include

  #include

  using namespace std;

  struct t

  {

  int tab[2];

  };

  class First

  {

  struct t u;

  public:

  First() {

  A. tab[0] = 1;

  B. tab[1] = 0; } void Print(){ cout << u.tab[0] << " " << u.tab[1]; } }; int main() { First t;

  C. Print(); }

  D. It prints: 2 2

  E. It prints: 1 1

  F. It prints: 1 0

  G. It prints: 0 0

  Correct Answer: C

• Question 39:

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

  #include

  #include

  using namespace std;

  struct Person {

  string name;

  int age;

  };

  class First

  {

  Person *person;

  public:

  First() {person = new Person;

  person?>name = "John";

  person?>age = 30;

  }

  void Print(){

  cout<name << " "<< person?>age;

  }

  };

  int main()

  {

  First t;

  A. Print(); }

  B. It prints: 30

  C. It prints: John

  D. It prints: John 30

  E. It prints: John 30John 30

  Correct Answer: C

• Question 40:

  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