A full hearing time is 9-5 with 1 hr break in between . Most cases will finish within the day, if you can't finish it within the day they will just reschedule another day to continue at where you left off. In a typical marriage is not genuine case, you and your spouse will be asked the same questions( the genesis of your relationship, how did your relationship evolved to the point of marriage, what happen at your wedding, what happen after your marriage etc and all the red flags in your blue book). You need to make sure you and your spouse's answers are the same, also the answers have to match what you put in your application forms because both the Judge and the MC will study your bluebook in great details before your hearing. I have seen couple got KO at the hearing because their answers do not match what they put in their application forms, you need to study your blue book carefully.