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

• Question 141:

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

  #include

  using namespace std;

  int main()

  {

  int i=2;

  switch(i)

  {

  case 1:

  cout<<"Hello";

  break;

  case 2:

  cout<<"world";

  break;

  case 3:

  printf("End");

  break;

  }

  return 0;

  }

  A. It prints: Hello

  B. It prints: world

  C. It prints: End

  D. It prints: E

  Correct Answer: B

• Question 142:

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

  #include

  using namespace std;

  class First

  {

  public:

  void Print(){ cout<<"from First";}

  };

  class Second

  {

  public:

  void Print(){ cout<< "from Second";}

  };

  int main()

  {

  Second t[2];

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

  t[i].Print();

  }

  A. It prints: from First

  B. It prints: from Firstfrom First

  C. It prints: from Secondfrom Second

  D. It prints: from Second

  Correct Answer: C

• Question 143:

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

  

  A. It prints: 13

  B. It prints: l

  C. It prints: 12

  D. It prints: 2

  Correct Answer: D

• Question 144:

  What is the output of the program?

  #include

  #include

  using namespace std;

  int main()

  {

  string s1[]= {"H" , "t" };

  string s;

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

  s = s1[i];

  if (i==0)

  s.insert(1,"ow");

  else

  s.push_back('o');

  cout << s;

  }

  return( 0 );

  }

  A. It prints: Hoto

  B. It prints: Ht

  C. It prints: toHo

  D. It prints: Howto

  Correct Answer: D

• Question 145:

  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

  Correct Answer: D

• Question 146:

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

  using namespace std;

  int fun(int x) {

  return 2*x;

  }

  int main(){

  int i;

  i = fun(0.5) || fun(0);

  cout << i;

  return 0;

  }

  A. It prints: 0

  B. It prints: 1

  C. It prints: -1

  D. Compilation error

  Correct Answer: A

• Question 147:

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

  #include

  using namespace std;

  int op(int x, int y)

  {

  int i;

  i = x + y;

  return i;

  }

  int main()

  {

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

  k = op(i, j);

  l = op(j, i);

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

  return 0;

  }

  A. It prints: 1,2

  B. It prints: ?1,1

  C. It prints: 1,1

  D. It prints: 3,3

  Correct Answer: D

• Question 148:

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

  #include

  using namespace std;

  class A

  {

  public:

  virtual void Print()=0;

  };

  class B:public A

  {

  public:

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

  };

  int main()

  {

  B ob2;

  A *obj;

  obj = andob2;

  obj?>Print();

  }

  A. It prints: B

  B. It prints: A

  C. It prints: AB

  D. It prints: BA

  Correct Answer: A

• Question 149:

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

  #include

  using namespace std;

  int main()

  {

  int i = 0;

  do {

  i++;

  if (i==3)

  break;

  cout<

  }

  while(i < 5);

  return 0;

  }

  A. It prints: 12

  B. It prints: 1

  C. It prints: 0

  D. No output

  Correct Answer: A

• Question 150:

  A condition expression used by if(), while(), and do-while() must evaluate to and only to:

  A. an int type value

  B. any value that can be treated as truth/falsehood

  C. a float type value

  D. a bool type value

  Correct Answer: B