Colleges › UIUC › Grades › CS 423
UIUC grade distribution

CS 423: Operating Systems Design

93% of the 1,001 students who finished CS 423 at UIUC got an A or B, across 12 sections and 5 instructors.

A 64%B 28%C 6%D/F 2%W 1%

Watch CS 423 for an open seat Free

Loading this semester's sections…

By instructor, easiest first

InstructorGrades givenStudents
Alagappan, Ramnatthan
1 section · last Spring 2025
94% A · 5% B · 0% C · 2% D/F
61
Past instructors (4) · last taught before 2022
Xu, Tianyin
5 sections · last Spring 2020
72% A · 26% B · 1% C · 1% D/F
398
Abdelzaher, Tarek
2 sections · last Spring 2016
72% A · 25% B · 2% C · 1% D/F
225
Fagen-Ulmschnei, Wade A
1 section · last Spring 2021
67% A · 21% B · 12% C · 0% D/F
84
Bates, Adam M
3 sections · last Spring 2019
36% A · 44% B · 16% C · 5% D/F
233

Instructors with at least 20 graded students. Past grades don't guarantee future ones.

Which CS 423 section is open right now?

ClassMaxx shows this semester's CS 423 sections with live seat counts, ranked by these grades, and alerts you when a full one opens.

Get the iPhone appAll colleges

ClassMaxx is not affiliated with UIUC. We never ask for a school password.

Source: grade distributions published by UIUC. All UIUC grade distributions · CS 423 sections, times and prerequisites.