Career fair/networking after Masters in Accounting?

Hey guys I'm headed into my last semester in undergrad. My undergraduate GPA will not be as high as I would like. I'm realistically aiming master programs where the Big Four recruit however. I know I will perform well in whichever program I attend. However I'm wondering exactly how the recruitment process works as far as getting an interview. Is it possible to obtain an interview based off of my graduate GPA and then talk about my undergraduate gpa later? The main thing I'm wondering here is if you attend the fair, provide your resume, and talk with recruiters, is that enough to get an interview if they like you and your resume? Or will you need to fill out an employment APPLICATION?? Any one who has ever been through this, please give me some feedback. Thanks