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

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

• Question 51:

  Which code line inserted instead of the comment below will cause the program to produce the expected output?

  

  A. ob2.A::print();
  B. ob2 ?gt; A::print();
  C. ob2.B::print();
  D. ob2 ?gt; B::print();
  A. ob2.A::print();

• Question 52:

  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
  D. It prints: Howto

  ---

  Explanation/Reference:

• Question 53:

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

  #include

  using namespace std;

  int main() {

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

  cout << i;

  return 0;

  }

  A. It prints: 0
  B. It prints: 1
  C. It prints: 2
  D. It prints: 0.5
  B. It prints: 1

• Question 54:

  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 :

  void print() {

  cout << "B ";

  }

  };

  int main() {

  B sc[2];

  B *bc = (B*)sc;

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

  (bc++)->print();

  return 0;

  }

  A. It prints: A A
  B. It prints: B B
  C. It prints: A B
  D. It prints: B A
  B. It prints: B B

• Question 55:

  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
  B. cout
  C. cout
  D. cout
  D. cout

• Question 56:

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

  #include

  using namespace std; int compare(int, int);

  int main()

  {

  int x = compare(10, 20);

  cout << x;

  return 0;

  }

  int compare(int i, int j)

  {

  return i

  }

  A. It prints: 0
  B. It prints: 2
  C. It prints: 1
  D. It prints: 10
  C. It prints: 1

• Question 57:

  Which of the following is a user defined data type?

  1:

  struct person

  {

  char name[20];

  int age;

  };

  2:

  int l=2;

  3:

  enum color {red,blue, green};

  A. 1
  B. 2
  C. 3
  D. 4
  A. 1
  C. 3

  ---

  Explanation/Reference:

• Question 58:

  If there is one, point out an error in the program

  #include

  using namespace std;

  int main()

  {

  int i=1;

  for(;;)

  {

  cout<

  if(i>5)

  break;

  }

  return 0;

  }

  A. Error in "if" statement
  B. Error in "for" loop
  C. No error
  D. Error in break statement
  C. No error

• Question 59:

  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
  A. It prints: 4 5

• Question 60:

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

  #include

  using namespace std;

  #define DEF_A 0

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

  cout << DEF_A;

  return 0;

  }

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