Mahalo (thanks in Hawaiian) for asking this question. Questions like this can be harmful or good, but they are questions designed for us to think. The enemy tries to confuse us. If we answer yes to this question, then we are saying God cannot lift every rock, and if we say no, we are saying God cannot make everything. Either way, we are limiting the limitless God. This very question came up for discussion in one of my Bible College classes back in 1970. After much debate, we came to the conclusion that God could do everything except one thing. That one thing is that God is perfect and cannot be less than perfect. Anything about God that makes Him less perfect is false, period. Also, keep in mind that our human understanding can not comprehend the fullness of God. We can only understand a small part of His Image that He chooses to show us.
Remember, if you don’t understand, ask!