Legal Question in Bankruptcy in California

Hard to say since you gave so few facts, but in general, yes. A little knowledge can be dangerous, so please consult with a bankruptcy attorney right away.

If you're asking whether you can stop a lawsuit before the date an answer is due or a trial is to be held, yes. A bankruptcy stops all collection activity, including lawsuits. The creditor might file a motion in bankruptcy court, though, for relief from the automatic stay to continue with the lawsuit if it's for possession of real property.