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

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

• Question 181:

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

  #include

  using namespace std;

  int fun(int x);

  int main() {

  cout << fun(0);

  }

  int fun(int x) {

  if(x > 0)

  return fun(x-1);

  else

  return 100;

  }

  A. It prints: 0
  B. It prints: 10
  C. It prints: 100
  D. It prints: -1
  C. It prints: 100

• Question 182:

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

  #include

  using namespace std;

  int main()

  {

  int i = 4;

  while(i >= 0) {

  cout<

  i??;

  }

  return 0;

  }

  A. It prints:"43210"
  B. It prints:"3210"
  C. It prints: "3210?1"
  D. None of these
  A. It prints:"43210"

• Question 183:

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

  #include

  #include

  using namespace std;

  class complex{

  double re, im;

  complex() : re(1),im(0.4) {}

  complex operator?(complex andt);

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

  };

  complex complex::operator? (complex andt){

  complex temp;

  temp.re = this?>re ? t.re;

  temp.im = this?>im ? t.im;

  return temp;

  }

  int main(){

  complex c1,c2,c3;

  c3 = c1 ? c2;

  c3.Print();

  }

  A. It prints: 1 0.4
  B. It prints: 2 0.8
  C. It prints: 0 0
  D. It prints: 1 0.8
  C. It prints: 0 0

• Question 184:

  What is the output of the program?

  #include

  using namespace std;

  class BaseC

  {

  int i;

  public:

  BaseC() { i=?1;}

  BaseC(int i) { i=i; }

  void seti(int a) { i = a; };

  void Print() { cout << i; }

  };

  int main()

  {

  BaseC *o = new BaseC();

  o?>seti(10);

  o?>Print();

  }

  A. It prints: 10
  B. It prints: ?1
  C. It prints: 0
  D. Compilation error
  A. It prints: 10

• Question 185:

  What is the expected result of the following program?

  

  A. It prints: 4
  B. The program enters an infinite loop
  C. It prints: 42
  D. It prints: 420
  C. It prints: 42

• Question 186:

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

  #include

  using namespace std;

  class Test {

  float i,j;

  };

  class Add {

  public:

  int x,y;

  Add (int a=3, int b=3) { x=a; y=b; }

  int result() { return x+y;}

  };

  int main () {

  Test test;

  Add * padd;

  padd = andtest;

  cout << padd?>result();

  return 0;

  }

  A. It prints: 6
  B. It prints: 9
  C. Compilation error
  D. It prints: 33
  C. Compilation error

• Question 187:

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

  #include

  #include

  using namespace std;

  class complex{

  double re, im;

  public:

  complex() : re(1),im(0.4) {}

  complex operator+(complex andt);

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

  };

  complex complex::operator+ (complex andt){

  complex temp;

  temp.re = this?>re + t.re;

  temp.im = this?>im + t.im;

  return temp;

  }

  int main(){

  complex c1,c2,c3;

  c3 = c1 + c2;

  c3.Print();

  }

  A. It prints: 1 0.4
  B. It prints: 2 0.8
  C. It prints: 0 0
  D. Garbage value
  B. It prints: 2 0.8

• Question 188:

  What is the output of the program?

  #include

  using namespace std;

  int main()

  {

  int tab[4]={10,20,30,40};

  tab[1]=10;

  int *p;

  p=andtab[0];

  cout<<*p;

  return 0;

  }

  A. It prints: 10
  B. It prints: 20
  C. It prints: 11
  D. It prints: 30
  A. It prints: 10

  ---

  Explanation/Reference:

• Question 189:

  What is the output of the program?

  #include

  #include

  using namespace std;

  struct t

  {

  int tab[2];

  };

  class First

  {

  struct t u;

  public:

  First() {

  u.tab[0] = 1;

  u.tab[1] = 0;

  }

  void Print(){

  cout << u.tab[0] << " " << u.tab[1];

  }

  };

  int main()

  {

  First t;

  t.Print();

  }

  A. It prints: 2 2
  B. It prints: 1 1
  C. It prints: 1 0
  D. It prints: 0 0
  C. It prints: 1 0

  ---

  Explanation/Reference:

• Question 190:

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

  #include

  #include

  using namespace std;

  inline float sum(float a,float b)

  {

  return a+b;

  }

  int main()

  {

  float a,b;

  a = 1.5; b = 3.4;

  cout<

  return 0;

  }

  A. It prints: 0
  B. It prints: 4.9
  C. It prints: 5
  D. It prints: 4
  B. It prints: 4.9