Weeding out

Read the following statements and tick the box next to the correct answer.


int a = 10;
int b = 20;
a = b;


The new values of a and b are:
[ ] a = 20  b = 0
[ ] a = 20  b = 20
[ ] a = 0   b = 10
[ ] a = 10  b = 10
[ ] a = 30  b = 20
[ ] a = 30  b = 0
[ ] a = 10  b = 30
[ ] a = 0   b = 30
[ ] a = 10  b = 20
[ ] a = 20  b = 10


[ ] a = 20  b = 0
[x] a = 20  b = 20
[ ] a = 0   b = 10
[ ] a = 10  b = 10
[ ] a = 30  b = 20
[ ] a = 30  b = 0
[ ] a = 10  b = 30
[ ] a = 0   b = 30
[ ] a = 10  b = 20
[ ] a = 20  b = 10

[x] a = 20  b = 0
[x] a = 20  b = 20
[x] a = 0   b = 10
[x] a = 10  b = 10
[x] a = 30  b = 20
[x] a = 30  b = 0
[x] a = 10  b = 30
[x] a = 0   b = 30
[x] a = 10  b = 20
[x] a = 20  b = 10

>>3

I think we've got a real programmer on our hands.

The new values of a and b are:
[ ] a = 20  b = 0
[ ] a = 20  b = 20
[ ] a = 0   b = 10
[ ] a = 10  b = 10
[ ] a = 30  b = 20
[ ] a = 30  b = 0
[ ] a = 10  b = 30
[ ] a = 0   b = 30
[ ] a = 10  b = 20
[ ] a = 20  b = 10
[x] False

>>1:6:0:
    Multiple declarations of `Weed.a'
    Decla*** Exception: stack overflow

Holy shit, I laughed out loud for no reason at all.

[࿊] a = 20  b = 0
[࿊] a = 20  b = 20
[࿊] a = 0   b = 10
[࿊] a = 10  b = 10
[࿊] a = 30  b = 20
[࿊] a = 30  b = 0
[࿊] a = 10  b = 30
[࿊] a = 0   b = 30
[࿊] a = 10  b = 20
[࿊] a = 20  b = 10

What the hell is going on here.

Bus error.
Core dumped.

>>9
The OP saw the FizzBuzz thread and thought it would be clever to copy/paste another beginner's exercise he saw on Reddit.