Be familiar with your status i.e. F1/ J1 and options. Educate and communicate this to an employer clearly and with confidence.
Research international employee friendly companies or Top Employers for Purdue International students.
Disclose your status in the second round, if it was not already discussed.
Remind employers of your CPT/OPT eligibility which allows them a 'trial run' with you before petitioning for your H1B visa.
Convey optimism about your chances for work permission approval, if you have begun the process.
Set yourself apart from your competitors—market the skills and qualities that you will bring to the firm that will make you stand out from the crowd.