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

• Question 21:

  Point out an error in the program.

  #include

  using namespace std;

  int main()

  {

  const int x=1;

  int const *y=andx;

  cout<<*y;

  return 0;

  }

  A. No error

  B. Error: unknown pointer conversion

  C. cannot convert from 'const int *' to 'int *const'

  D. Compilation error

  Correct Answer: A

• Question 22:

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

  #include

  using namespace std;

  int op(int x, int y)

  {

  return x?y;

  }

  int op(int x, float y)

  {

  return x+y;

  }

  int main()

  {

  int i=1, j=2, k, l;

  float f=0.23;

  k = op(i, j);

  l = op(j, f);

  cout<< k << "," << l;

  return 0;

  }

  A. It prints: ?1,?1

  B. It prints: ?1,3

  C. It prints: ?1,2

  D. Compilation fails

  Correct Answer: C

• Question 23:

  What is the output of the program if character 4 is supplied as input?

  #include

  using namespace std;

  int main () {

  int c;

  cin >> c;

  {

  switch (c)

  {

  case 1:

  throw 20;

  case 2:

  throw 5.2f;

  case 3:

  throw 'a';

  default:

  cout<<"No exception";

  }

  }

  catch (int e)

  { cout << "int exception. Exception Nr. " << e; }

  catch (float e)

  { cout << "float exception. Exception Nr. " << e; }

  catch (...)

  { cout << "An exception occurred."; }

  return 0;

  }

  A. It prints: float exception. Exception Nr.

  B. It prints: int exception. Exception Nr.

  C. It prints: An exception occurred

  D. It prints: No exception

  Correct Answer: D

• Question 24:

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

  #include

  using namespace std;

  int main(){

  int *i;

  i = new int;

  *i = 1.0 / 2 * 2 / 1 * 2 / 4 * 4;

  cout << *i;

  return 0;

  }

  A. It prints: 0

  B. It prints: 1

  C. It prints: 2

  D. It prints: 0.5

  Correct Answer: C

• Question 25:

  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";} };

  int main () {

  A a2("Test");

  B b1("Alan");

  B b2(b1);

  return 0;

  }

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

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

  C. It prints: A no parametersB string parameter

  D. It prints: A no parametersA no parameters

  Correct Answer: B

• Question 26:

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

  #include

  using namespace std;

  void fun(int andi);

  int main()

  {

  int i=2;

  fun(i);

  cout<

  return 0;

  }

  void fun(int andi)

  {

  i+=2;

  }

  A. It prints: 2

  B. It prints: 0

  C. It prints: 4

  D. It prints: 16

  Correct Answer: C

• Question 27:

  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

  Correct Answer: C

• Question 28:

  What is the output of the program?

  #include

  #include

  using namespace std;

  int main()

  {

  string s1="Wo";

  string s2;

  s2 = s1;

  string s3;

  s3 = s2.append("rldHello");

  cout << s3;

  return( 0 );

  }

  A. It prints: WorldHello

  B. It prints: HelloWo

  C. It prints: World

  D. It prints: Hello

  Correct Answer: A

• Question 29:

  Which of the following can be checked in a switch?case statement?

  A. char

  B. int

  C. enum

  D. double

  Correct Answer: ABC

• Question 30:

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

  using namespace std;

  int op(int x, int y);

  int main()

  {

  float *pf;

  float f=0.9;

  pf=andf;

  cout << op(1, *pf);

  return 0;

  }

  int op(int x, int y)

  {

  return x*y;

  }

  A. It prints: 0

  B. It prints: 0.5

  C. It prints: 1

  D. It prints: ?1

  Correct Answer: A