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

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

• Question 171:

  Which code, inserted at line 12, generates the output "5b"? #include using namespace std; namespace myNamespace1 { int var = 5; } namespace myNamespace2 { char var = 'b'; } int main () { //insert code here return 0; }

  A. cout
  B. cout
  C. cout
  D. None of these
  C. cout

• Question 172:

  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
  A. It prints: 0

• Question 173:

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

  #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:

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

  void Print() { cout << y << A::z; }

  };

  int main () {

  B b;

  b.set();

  b.Print();

  return 0;

  }

  A. It prints: 4John
  B. It prints: 2John
  C. It prints: 23
  D. It prints: 43
  D. It prints: 43

  ---

  Explanation/Reference:

• Question 174:

  Which code lines inserted independently instead of the comment will make the following program work correctly? (Choose three.)

  

  A. int main (int argc, char *argv[])
  B. int main (int c, char *v[])
  C. int main
  D. void main ()
  A. int main (int argc, char *argv[])
  B. int main (int c, char *v[])

• Question 175:

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

  

  A. It prints: AAABDD
  B. It pints: AABD
  C. It prints: AABDD
  D. It causes a compilation error
  D. It causes a compilation error

• Question 176:

  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
  A. It prints: 2

• Question 177:

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

  

  A. It prints: 10
  B. It prints: 2+32+3
  C. It prints: 7
  D. It prints: 22+3
  D. It prints: 22+3

• Question 178:

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

  #include

  using namespace std;

  void fun(char*);

  int main()

  {

  char t[4]={'0', '1', '2', '3'};

  fun(andt[2]);

  return 0;

  }

  void fun(char *a)

  {

  cout << *a;

  }

  A. It prints: 2
  B. It prints: 21
  C. It prints: 00
  D. It prints: 02
  A. It prints: 2

• Question 179:

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

  #include

  class complex{

  double re;

  double im;

  public:

  complex() : re(0),im(0) {}

  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(1,2);

  c1.print();

  return 0;

  }

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

• Question 180:

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

  #include

  using namespace std;

  void set(struct person*);

  struct person

  {

  char name[25];

  int age;

  };

  int main()

  {

  struct person e = {"Steve", 30};

  set(ande);

  cout<< e.name << " " << e.age;

  return 0;

  }

  void set(struct person *p)

  { p?>age = p?>age + 1; }

  A. Error: in prototype declaration unknown struct person
  B. Error: in structure
  C. It prints: Steve 31
  D. None of these
  C. It prints: Steve 31