I say no with a caveat. You can not be both omniscient and omnipotent without being omnipresent. To know all and do all, you must be all. There we go with that Trinity thing again. How can you know all without being every where?

In mathematical terms, a subset is always a part of the master set. Can God be all powerful and create an immovable object? The object would be immovable for all but He who created it. Is it truly immovable, yes to all who encounter it be He who created it. Being omnipresent would mean that the rock is apart of Him.

As a man, you can build a house that you yourself can not move under your own power. If you employ other methods to assist, you can then move the house. All powerful, all knowing and all present means you have all the power needed to do anything, including exceeding limitations, imagination and boundaries.