CPA Chapter 8 Assessment Online 100%

1. Question

1 points

What happens when you attempt to compile and run the following code? #include <iostream> using namespace std; class Int { public: int v; Int(int a) { v = a; } }; int main() { Int i = 1; cout << i; return 0; }

It prints 0
It prints 1
Compilation fails
It prints 2

2. Question

1 points

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

#include <iostream> using namespace std; class Int { public: int v; Int(int a) { v = a; } }; ostream &operator <<(Int &a) { return cout << a.v; } int main() { Int i = 1; cout << i; return 0; }

Compilation fails
It prints 1
It prints 0
It prints 2

3. Question

1 points

What happens when you attempt to compile and run the following code? #include <iostream> using namespace std; class Int { public: int v; Int(int a) { v = a; } }; ostream &operator <<(ostream &o, Int &a) { return o << --a.v; } int main() { Int i = 1; cout << i; return 0; }

It prints 1
It prints 0
It prints 2
Compilation fails

4. Question

1 points

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

#include <iostream> using namespace std; class Int { public: int v; Int(int a) { v = a; } Int &operator--() { ++v; return *this; } }; ostream &operator <<(ostream &o, Int &a) { return o << --a.v; } int main() { Int i = 2; cout << i; return 0; }

Compilation fails
It prints 2
It prints 1
It prints 0

5. Question

1 points

What happens when you attempt to compile and run the following code? #include <iostream> using namespace std; class Int { public: int v; Int(int a) { v = a; } Int &operator--() { ++v; ++v; return *this; } }; ostream &operator <<(ostream &o, Int &a) { return o << a.v++; } int main() { Int i = 0; cout << --i; return 0; }

It prints 2
Compilation fails
It prints 0
It prints 1

6. Question

1 points

What happens when you attempt to compile and run the following code? #include <iostream> using namespace std; class Int { public: int v; Int(int a) { v = a; } Int &operator--() { ++v; return *this; } Int &operator--(int v) { v+=2; return *this; } }; ostream &operator <<(ostream &o, Int &a) { a.v++; return o << a.v; } int main() { Int i = 0; --i ; i--; cout << i << i; return 0; }

It prints 23
It prints 21
It prints 12
It prints 10
Compilation fails

7. Question

1 points

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

#include <iostream> using namespace std; class Int { public: int v; Int(int a) { v = a; } Int &operator++(int x) { v+=2; return *this; } }; ostream &operator <<(ostream &o, Int &a) { return o << a.v; } int main() { Int i = 0; i++; cout << i << i.v; return 0; }

It prints 20
It prints 22
It prints 21
Compilation fails

8. Question

1 points

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

#include <iostream> using namespace std; class Int { public: int v; Int(int a) { v = a; } Int &operator[](int x) { v+=x; return *this; } }; ostream &operator <<(ostream &o, Int &a) { return o << a.v; } int main() { Int i = 2; cout << i.v ;

cout << i[2]; return 0; }

It prints 44
It prints 24
It prints 22
It prints 33
Compilation fails

9. Question

1 points

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

#include <iostream> using namespace std; enum T { A, B, C }; class Int { public: T v; Int(T a) { v = a; } }; ostream &operator <<(ostream &o, Int &a) { return o << a.v; } int main() { Int i = B; cout << i; return 0; }

Compilation fails
It prints 0
It prints B
It prints 1

10. Question

1 points

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

#include <iostream> using namespace std; enum T { A = 2, B = -1, C }; class Int { public: T v; Int(T a) { v = a; } Int & operator++() { v = C; return *this; } }; ostream &operator <<(ostream &o, Int &a) { ++a; return o << a.v; } int main() { Int i = B; cout << i; return 0; }

It prints C
It prints 0
Compilation fails
It prints 1

11. Question

1 points

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

#include <iostream> using namespace std; enum T { A = 2, B = -1, C }; class Int { public: T v; Int(T a) { v = a; } Int & operator++() { v += 2; return *this; } }; ostream &operator <<(ostream &o, Int &a) { ++a; return o << a.v; } int main() { Int i = B; cout << i; return 0; }

It prints 0
Compilation fails
It prints 1
It prints 2

12. Question

1 points

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

#include <iostream> using namespace std; enum T { A = 2, B = -1, C }; T operator+(T t, int i) { switch(t) { case A: return T(0); case B: return static_cast<T>(2); default:return (T)1; } } int main() { T i = A + 2; cout << i; return 0; }

It prints 2
Compilation fails
It prints 1
It prints 0

13. Question

1 points

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

#include <iostream> using namespace std; class N { public: float x; N() { x = 0.0; } N(float a) { x = a; } N(N &n) { x = n.x; } N &operator%(N &y) { return *new N((int)x % (int)y.x); } }; int main() { N a(2.0),b(4.0); N c = a % b; cout << c.x; return 0; }

Compilation fails
It prints 2
It prints 0
It prints 1

14. Question

1 points

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

#include <iostream> using namespace std; class N { public: float x; N() { x = 0.0; } N(float a) { x = a; } N(N &n) { x = n.x; } N &operator<<(N &y) { return *new N(x * 10); } }; int main() { N a(2.0),b(4.0); N c = a << 1; cout << c.x; return 0; }

It prints 2
It prints 0
It prints 1
Compilation fails

15. Question

1 points

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

#include <iostream> using namespace std; class N { public: float x; N() { x = 0.0; } N(float a) { x = a; } N(N &n) { x = n.x; } }; N &operator=(N &y,float f) { return *new N(f); } int main() { N a; a = 2.0; cout << a.x; return 0; }

Compilation fails
It prints 2
It prints 1
It prints 0

16. Question

1 points

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

#include <iostream> using namespace std; class N { public: float x; N() { x = 0.0; } N(float a) { x = a; } N(N &n) { x = n.x; } N &operator=(float f) { x = f - 1; return *this; } }; int main() { N a; a = 2.0; cout << a.x; return 0; }

It prints 2
It prints 0
It prints 1
Compilation fails

17. Question

1 points

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

#include <iostream> #include <string> using namespace std; class N { public: float x; N() { x = 0.0; } N(float a) { x = a; } N(N &n) { x = n.x; } string operator==(float f) { if(int(x) == int(f)) return "true"; else return "false"; } }; int main() { N a(1.1); cout << (a == 1.9); return 0; }

It prints true
It prints an empty string
Compilation fails
It prints false

18. Question

1 points

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

#include <iostream> using namespace std; string operator>(float l, float r) { if(int(l) > int(r)) return "true"; else return "false"; } int main() { float l = 2.0, r=2.9999; cout << (l > r); return 0; }

It prints true
Compilation fails
It prints an empty string
It prints false

19. Question

1 points

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

#include <iostream> #include <string> using namespace std; class N { public: float x; N() { x = 0.0; } N(float a) { x = a; } N(N &n) { x = n.x; } string operator==(N &n) { if(this != &n) return "true"; else return "false"; } }; int main() { N a(1.1), *b = &a; cout << (a == *b); return 0; }

It prints true
Compilation fails
It prints false
It prints an empty string

20. Question

1 points

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

#include <iostream> #include <string> using namespace std; class X { public: string n; X(string s) : n(s) {} void operator() (X x) { cout << x.n; } }; int main(void) { X x("a"),y("b"); x(y); y(x); return 0; }

It prints ba
Compilation fails
It prints an empty string
It prints ab

CPA Chapter 8 Assessment Online 100%