About Question enthuware.ocpjp.v7.2.1491 :

[Chandra]

What about option 2? If option 3 is correct, then obviously option 2 is also correct right? Please help, why particularly 5th option is mentioned correct here for //2 line?

[admin]

What about option 2? If option 3 is correct, then obviously option 2 is also correct right?

Why do you think so?
Did you read the detailed explanation provided? Let me know which part is not clear.

[Chandra]

I misunderstood it and didn't noticed that "a" actually points to "b" array.

a=b; //1

Now I got it. Thanks!!