Here are the questions that were asked at my hubby's interview. Our police certificate was fine since we just got it in June.
They asked the following paperwork at the window:
Marriage Cert
Police Cert
2017 taxes for sponsor and co-sponor.
Birth Cert
Oh and if you had US visa, please bring it also because they are asking for it if you are approved.
Here are the questions:
Hubby thinks the CO didn't want to approve him but found nothing. By the way, the CO spoke Spanish to him with some accent. Hope it helps.