asalamualaikum......
this is my personal experience in my college life during exams ...alhamdulillah..as i used to go for exams with fajar namaz always and after tat i do two rakath nafil ...this helped me a lot in my experience, watever i study or revising after fajar namaz with two rakath nafil every thing wil come in question paper..
this is not for this case alone ...watever the situation u r in try to do namaz in u r near by masjid...may ALLAH show his peace and blessings on all of us...
"say u r prayer before others pray (janaza) for u"