["I did the final exams for my course last week, and I did so much studying and cramming, I'm sure I aced it.", 'Hopefully, your hard work payed off. Where the finals hard?', "Fingers crossed. Yeah, they were super hard, but when you have enough time to study, nothing's too hard."]
I agree with you. Hard work tends to give the results in the end.
I took some exams last week, and I did so much preparation, I'm certain I did well.