1. Be Confident, calm (take a deep breathing), you already close to the last step.
2. Review all/most of
thread, inheritence/overloading/overriding Questions. Oh! I mean just review those a little tricks but not too trick (anyway, there is a trick, almost you answer wrong at the first time) but some just very usual Questions.
3. Exception, gc, Shift, collection, IO, just a couple very regular Questions.
4. forget those main(), int[][] x,int x[][]..., those too usual seen Questions. get rid of those too rigid, too unusual, and too..., sorry, it's alreay out of my head.
Above suggestions are just personal experience, does not represent all possible situation.
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