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

• Question 31:

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

  #include

  using namespace std;

  int main(){

  int i = 1;

  if (i==1) {

  cout << i;

  } else {

  cout << i-1;

  }

  return 0;

  }

  A. It prints: 0

  B. It prints: 1

  C. It prints: -1

  D. It prints: 2

  Correct Answer: B

• Question 32:

  Which of the following statements are correct?

  A. A function can be defined inside another function

  B. A function may have any number of return statements each returning different values.

  C. A function can return floating point value

  D. In a function two return statements should never occur.

  Correct Answer: BC

• Question 33:

  What will the variable "y" be in class B?

  class A {

  int x;

  protected:

  int y;

  public:

  int age;

  };

  class B : private A {

  string name;

  public:

  void Print() {

  cout << name << age;

  }

  };

  A. public

  B. private

  C. protected

  D. None of these

  Correct Answer: B

• Question 34:

  What is the output of the program?

  #include

  #include

  using namespace std;

  int main()

  {

  string s1="Hello";

  string s2="World";

  s1+=s2;

  cout << s1;

  return( 0 );

  }

  A. It prints: HelloWorld

  B. It prints: Hello

  C. It prints: World

  D. It prints: HelWorld

  Correct Answer: A

• Question 35:

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

  #include

  using namespace std;

  int main()

  {

  const int x=20;

  const int *ptr;

  ptr = andx;

  *ptr = 10;

  cout<<*ptr;

  return 0;

  }

  A. It prints: 20

  B. It prints: 10

  C. Compilation error at line 8

  D. It prints address of ptr

  Correct Answer: C

• Question 36:

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

  #include

  #include

  using namespace std;

  class A {

  public:

  A() { cout << "A0 ";}

  A(string s) { cout << "A1";}

  };

  class B : public A {

  public:

  B() { cout << "B0 ";}

  B(string s) { cout << "B1 ";}

  };

  class C : private B {

  public:

  C() { cout << "C0 ";}

  C(string s) { cout << "C1 ";}

  };

  int main () {

  B b1;

  C c1;

  return 0;

  }

  A. It prints: A0 B0 A0 B1 A0 C0 A0 C1

  B. It prints: B0 B1 C0 C1

  C. It prints: A0 B0 A0 B0 C0

  D. It prints: B0 B1

  Correct Answer: C

• Question 37:

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

  #include

  using namespace std;

  int getValue();

  int main()

  {

  const int x = getValue();

  cout<

  return 0;

  }

  int getValue()

  {

  return 5;

  }

  A. It will print 0

  B. The code will not compile.

  C. It will print 5

  D. It will print garbage value

  Correct Answer: C

• Question 38:

  What will the variable "age" be in class B?

  class A {

  int x;

  protected:

  int y;

  public:

  int age;

  A () { age=5; };

  };

  class B : public A {

  string name;

  public:

  B () { name="Bob"; };

  void Print() {

  cout << name << age;

  }

  };

  A. public

  B. private

  C. protected

  D. None of these

  Correct Answer: A

• Question 39:

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

  #include

  using namespace std;

  int s(int n);

  int main()

  {

  int a;

  a = 3;

  cout << s(a);

  return 0;

  }

  int s(int n)

  {

  if(n == 0) return 1;

  return s(n?1)*n;

  }

  A. It prints: 4

  B. It prints: 6

  C. It prints: 3

  D. It prints: 0

  Correct Answer: B

• Question 40:

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

  #include

  using namespace std;

  int fun(int x) {

  return x<<2;

  }

  int main(){

  int i;

  i = fun(1) / 2;

  cout << i;

  return 0;

  }

  A. It prints: 0

  B. It prints: 1

  C. It prints: 2

  D. It prints: 4

  Correct Answer: C