Final answer:
The subject of this question is Grades. The exam scores are being used to assign letter grades to students based on their performances.
Step-by-step explanation:
The subject of this question is Grades. Given an array of exam scores, the question is asking what the array represents. In this case, the exam scores are being used to assign letter grades to students based on their performances. The letter grades are typically assigned in a bell curve distribution, with A, B, C, D, and F representing different ranges of scores.