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

• Question 171:

  What is the output of the program?

  #include

  using namespace std;

  #define SQR(x)(x*x)

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

  int x, y=2;

  x = SQR(y);

  cout << x << ", " <

  return 0;

  }

  A. It prints: 3, 2

  B. It prints: 4, 2

  C. It prints: 3, 3

  D. It prints: 9, 2

  Correct Answer: B

• Question 172:

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

  #include

  #include

  using namespace std;

  class Base

  {

  string s;

  public:

  Base() { s="Sample text";}

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

  void Print() { cout << s; }

  };

  int main()

  {

  Base *o = new Base();

  o?>Print();

  }

  A. It prints: Sample text

  B. It prints: Sample

  C. It prints: text

  D. None of these

  Correct Answer: A

• Question 173:

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

  

  A. It prints: 4

  B. It prints: 1

  C. It causes a compilation error

  D. lit prints: 0

  Correct Answer: C

• Question 174:

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

  #include

  using namespace std;

  class A

  {

  public:

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

  };

  class B:public A

  {

  public:

  virtual 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: A

• Question 175:

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

  

  A. It prints: 1

  B. It causes a compilation error

  C. It prints: 0

  D. It prints: My exception,

  Correct Answer: B

• Question 176:

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

  

  A. It prints: 33

  B. It prints: 007

  C. It causes a compilation error

  D. lit prints: 9

  Correct Answer: C

• Question 177:

  Which of the following statements may completely ignore their bodies (inner statements)? (Choose three.)

  A. do

  B. swicch

  C. for

  D. while

  Correct Answer: BCD

• Question 178:

  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];

  s.insert(1,"ow");

  cout << s;

  }

  return( 0 );

  }

  A. It prints: How

  B. It prints: Ht

  C. It prints: Hoto

  D. It prints: Howtow

  Correct Answer: D

• Question 179:

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

  

  A. a = b * c;

  B. return a = b * c;

  C. return a = b * *c;

  D. a = b * *c;

  Correct Answer: C

• Question 180:

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

  #include

  #include

  using namespace std;

  struct Person {

  string name;

  int age;

  };

  class First

  {

  Person *person;

  public:

  First() {person = new Person;

  person?>name = "John";

  person?>age = 30;

  }

  void Print(){

  cout<name << " "<< person?>age;

  }

  };

  int main()

  {

  First t;

  t.Print();

  }

  A. It prints: 30

  B. It prints: John

  C. It prints: John 30

  D. It prints: John 30John 30

  Correct Answer: C