[annalex]

This does not actually happen, of course, it is an illustration used to make a point. (God didn't really "wonder" where Adam was in the Garden.) This was an outward call, one of many, but God maintains control. Part of the point is that God would be fully justified in destroying the tree for not bearing fruit. However, the owner is "merciful" and will give the tree another chance. The bottom line is that what the owner says, goes.

The point made by this parable is indeed that to God belong both justice and mercy; but the parable also indicates that just as the tree grows or doesn't grow by itself, likewise man has free will. The point of God not knowing where Adam was is, of course none other but to explain to us that God did not program Adam to hide.

[Kolokotronis]

“The point of God not knowing where Adam was is, of course none other but to explain to us that God did not program Adam to hide.”

Very good, Alex! :)

[Forest Keeper]

The point of God not knowing where Adam was is, of course none other but to explain to us that God did not program Adam to hide.

I think it means more than that, but what you say IS consistent with the passage. The act of attempted hiding from God is itself sin, and God does not program anyone to commit sin. Gen. 3:8-10 also shows us that shame comes from sin, and that it is futile to try to hide from God.