When does one know or recieve NOA from USCIS of the exact interview date after filing N400 online ... is it after NOA for biometrics that they send another NOA for interview date or do they let you know in the NOA immdiately after filing online or does one recieve NOA a few weeks after filing N400 of their biometrics with exact interview date... that way its easy if there are any emergency international trips that may come up if you have exact interview date given by USCIS...