Final answer:
The university employs a numerical coding system for course levels that aligns numbers with the year of study, from freshmen to seniors.
Step-by-step explanation:
The university is using a numerical coding system to differentiate course levels by year, where courses intended for freshmen are numbered from 100 to 199 and courses for seniors are numbered from 400 to 499. This systematic approach ensures that the course numbers not only identify a particular course but also indicate the intended year of study, making the educational path clear for students and administrators alike. In this context, the numbers (100-199 for freshmen, 400-499 for seniors) identify the complexity and advancement of the courses, aligning with the students' progress through their university education.