Here is a goal: How to know that the cake is fully cooked and ready to exit the oven?

How would you accomplish this goal?

OPTIONS: [I] Using a toothpick, prod into the middle of cake and remove, should it remove without crumbs it is ready to be removed; [II] Using a toothpick, prod into the outside of the cake gently and remove, should there be any crumbs on the cake toothpick it is done;
[I]