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

• Question 41:

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

  #include

  using namespace std;

  #define DEF_A 0 #define

  DEF_B DEF_A+1 #define

  DEF_C DEF_B+1

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

  cout << DEF_C;

  return 0;

  }

  A. It prints: 2

  B. It prints: 10

  C. It prints: 0

  D. It prints: 1

  Correct Answer: A

• Question 42:

  Which code, inserted at line 10, generates the output "Hello World"? #include

  #include

  using namespace std;

  string fun(string, string);

  int main()

  {

  string s="Hello";

  string *ps;

  ps = ands;

  //insert code here

  return 0;

  }

  string fun(string s1, string s2)

  {

  return s1+s2;

  }

  A. cout << fun(" World");

  B. cout << fun(*ps);

  C. cout << fun("Hello");

  D. cout << fun("Hello", " World");

  Correct Answer: D

• Question 43:

  What is the output of the program given below?

  #include

  using namespace std;

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

  {

  int i=10;

  {

  int i=0;

  cout<

  }

  cout<

  return 0;

  }

  A. 1010

  B. 100

  C. 010

  D. None of these

  Correct Answer: C

• Question 44:

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

  #include

  using namespace std;

  int main()

  {

  int *t; t = new int[2];

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

  t[i]=0;

  }

  cout << t[1];

  }

  A. It prints: 0

  B. It prints: 1

  C. It prints: 2

  D. It prints: 3

  Correct Answer: A

• Question 45:

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

  #include

  using namespace std;

  struct {

  int x;

  char c;

  union {

  float f;

  int i;

  };

  } s;

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

  {

  s.x=10;

  s.i=0;

  cout << s.i << " " << s.x;

  }

  A. It prints: 0 10

  B. It prints: 11

  C. Compilation error

  D. None of these

  Correct Answer: A

• Question 46:

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

  #include

  #include

  using namespace std;

  class A {

  public:

  string s;

  A(string s) { this?>s = s; }

  };

  class B {

  public:

  string s;

  B (A a) { this?>s = a.s; }

  void print() { cout<

  };

  int main()

  {

  A a("Hello world");

  B b=a;

  b.print();

  }

  A. It prints: Hello world

  B. It prints: Hello

  C. Compilation error

  D. None of these

  Correct Answer: A

• Question 47:

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

  #include

  using namespace std;

  class complex{

  double re;

  double im;

  public:

  complex(double x) { re=x,im=x;};

  complex(double x,double y) { re=x,im=y;}

  void print() { cout << re << " " << im;}

  };

  int main(){

  complex c1;

  c1 = 3.0;

  c1.print();

  return 0;

  }

  A. It prints: 0 0

  B. It prints: 1 1

  C. It prints: 3 3

  D. Compilation error

  Correct Answer: C

• Question 48:

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

  #include

  using namespace std;

  class A

  {

  public:

  void Print(){ cout<<"A";}

  };

  class B:public A

  {

  public:

  void Print(){ cout<< "B";}

  };

  int main()

  {

  A *obj;

  A ob1;

  obj = andob1;

  obj?>Print();

  B ob2;

  obj = andob2;

  obj?>Print();

  }

  A. It prints: AB

  B. It prints: AA

  C. It prints: BA

  D. It prints: BB

  Correct Answer: B

• Question 49:

  How could you pass arguments to functions?

  A. by value

  B. by reference

  C. by pointer

  D. by void

  Correct Answer: ABC

• Question 50:

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

  #include

  using namespace std;

  int main(){

  int i, j;

  for(i = 0, j = 1; j < 2, i < 4; i++, j++);

  cout << i << " " << j;

  return 0;

  }

  A. It prints: 4 5

  B. It prints: 2 3

  C. It prints: 3 2

  D. It prints: 4 3

  Correct Answer: A