rental leases

I was wondering what kind of questions does a landlord or a rental agency ask on a rental lease. Do they normally ask for your social security number drivers license, criminal history or is it just about past rentals to see if pay rent on time. I was asked about my financial and had to supply two pictures of myself for one rental. That was my first application I ever did and wonder if that is normal or if it is more generic questions just showing you have the money to pay rent. I can see paying security to hold and first and last months rent to make sure you don't skip out on them. Thanks In advance for your replies.