Employers (except for specific government roles such as police or state attorneys) cannot legally ask if you have expunged your criminal record. Once your record is expunged or sealed, neither public nor private employers can use it against you when making hiring decisions.
When it comes to housing or education, once something has been expunged or sealed, they will no longer see or have access to any of it. It will essentially be like it was never on your record to begin with.