According to Genesis it is obvious he is not omniscient... or he must be an idiot.
__ Genesis, chaptesr 1 and 6So God created man in his own image....
And God saw everything that he had made, and behold, it was very good.
. . . .
And the Lord regretted that he had made man on the earth, and it grieved him to his heart. So the Lord said, “I will blot out man whom I have created from the face of the land, man and animals and creeping things and birds of the heavens, for I am sorry that I have made them.
Apparently this great and powerful god did not see this coming. And then the giant, imaginary idiot decides he should kill ALL the animals, because ONE of them, just one, 'man,' was corrupt.
So this guy is not only not omniscient, he is unfair.