@Clare Cui - I don't ask the prospective tenants questions aside from a preliminary qualification check and our rental application. The saying in the business is (it's a bit jaded I admit) "see the tenant's lips moving, see the tenant lying." We do have a general section on our application and ask the following questions.
Have you been served a late rent notice in the last 7yr?
Do any of the people who would be living in the apartment smoke?
How long do you think you would be renting from us?
Have you ever filed for bankruptcy? if so, when?
When would you be able to move in? have you been convicted of a felony in the last 5yrs?
Have you ever been served and eviction notice? if so when?
How many animals do you have? (list type, breed approx weight & age)
Have you ever had reoccurring problems with your current landlord? if yes, please explain:
Why are you moving from your current address?
List any verifiable sources and amounts of income you wish to have considered (optional):
If you were to run into financial difficulty in the future and couldn't come up with the money to pay rent, do you know someone that would loan you the money? if so, provide the person's name, address, & phone number so that we can use them as a reference for you.
Have you been party to a lawsuit in the past? If yes, please explain why:
We may run a credit check and a criminal background check. is there anything negative we will find that you want to comment on?
How did you hear about this apartment?
Do you know of anybody else looking for an apartment? please provide their name and number. if you refer a friend and you each end up renting separate apartments from us then we will pay you a referral award.
Again we hold these answers loosely and use them to guide our questions to their references.
We also check their social media postings. Most know to make those private but not all do and you would be surprised what shows up on those.
The bottom line is dig, dig, dig. I tell prospects that are moving in with the SO that I probably know more about their partner then they do from a financial standpoint.