Form Interrogatories are a list of questions on a court form. Form Interrogatories—General (DISC-001).Effective immediately, for Civil, Family, and Probate eFilings, the upcoming hearing date must be included in the filing description box. This HowTo Guide addresses the steps for filing and serving motions in general civil cases in Contra Costa County Superior Court. Contra Costa Superior Court. Information about filing court documents in Contra Costa County, California. Services. eFiling. Were issued on pending discovery disputes: 1. 04-2648 - Docket No. 283 : Re: plaintiffs' motion to compel defendants Contra Costa. Interrogatories are useful, particularly early in the case, for identifying witnesses to depose or interview. You complete our easy online questionnaire, and we professionally prepare and file your legal documents with the Court.