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

• Question 131:

  What is the output of the program given below?

  #include

  using namespace std;

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

  {

  enum state { ok, error, warning};

  enum state s1, s2, s3, s4;

  s1 = ok;

  s2 = warning;

  s3 = error;

  s4 = ok;

  cout << s1<< s2<< s3<< s4;

  return 0;

  }

  A. 1234

  B. compilation fails

  C. 0210

  D. 1322

  Correct Answer: C

• Question 132:

  What happens if you try to compile and run this program?

  #include

  using namespace std;

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

  {

  print("Test");

  return 0;

  }

  void print(int c[])

  {

  cout<

  }

  A. It prints: Test

  B. Compilation fails

  C. Program terminates abnormally

  D. None of these

  Correct Answer: B

• Question 133:

  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[2];

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

  t[i].Print();

  }

  A. It prints: 30

  B. It prints: John

  C. It prints: John 31

  D. It prints: John 30John 30

  Correct Answer: D

• Question 134:

  What is the output of the program?

  #include

  #include

  using namespace std;

  int main()

  {

  char str[] = "Hello\0\World\0";

  cout << str;

  return 0;

  }

  A. It prints: Hello

  B. It prints: World

  C. It prints: HW

  D. It prints: World\0World

  Correct Answer: A

• Question 135:

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

  #include

  using namespace std;

  class A {

  public:

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

  };

  class C:public A {

  public:

  virtual void Print()=0;

  };

  int main()

  {

  C obj3;

  obj3?>Print();

  }

  A. It prints: BB

  B. It prints: A

  C. It prints: AB

  D. Compilation error

  Correct Answer: D

• Question 136:

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

  #include

  using namespace std;

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

  {

  int tab[5]={1,2,3};

  for (int i=0; i<5; i++)

  cout <

  return 0;

  }

  A. compilation fails

  B. It prints: 12300

  C. It prints: 12345

  D. It prints: 00000

  Correct Answer: B

• Question 137:

  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 A {

  public:

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

  };

  class C:public B {

  public:

  void Print(){ cout<< "C";}

  };

  int main()

  {

  A ob1;

  B ob2;

  C ob3;

  B *obj;

  obj = andob2;

  obj?>Print();

  obj = andob3;

  obj?>Print();

  }

  A. It prints: BB

  B. It prints: AA

  C. It prints: BC

  D. It prints: AB

  Correct Answer: C

• Question 138:

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

  #include

  using namespace std;

  class First

  {

  public:

  First() { cout << "Constructor";}

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

  };

  int main()

  {

  First FirstObject;

  FirstObject.Print();

  }

  A. It prints: Constructorfrom First

  B. It prints: Constructor

  C. It prints: from First

  D. None of these

  Correct Answer: A

• Question 139:

  Which line of code inserted instead of the comment will make the following code run properly without causing memory leaks?

  

  A. ~Base() ( delete this; }

  B. no additional code is needed

  C. ~Base() { delete ptr; delete ptr; }

  D. ~Base() { delete ptr; }

  Correct Answer: D

• Question 140:

  If a function, which is not a method, needs to save any value between its subsequent invocations, this can be done by: (Choose two.)

  A. setting a variable declared inside the function with the static modifier

  B. setting a parameter of the function

  C. setting a variable declared outside the function

  D. setting a variable declared inside the function without the static modifier

  Correct Answer: AC