COM SCI 111
Operating Systems Principles
Grades
3.13
Average grade awarded in COM SCI 111. Not a student rating: this is what the grades were.
In the A range
37%
of the 1,604 letter grades
D, F or W
3.9%
of every letter grade awarded, plus withdrawals
Taken pass/no pass
-
the registrar has this letter grade only this term
The registrar's own records: 1,604 grades over 12 terms, Fall 2021 to Fall 2025. Every instructor is pooled here.
What is inside that record
2 of those terms are summer sessions, and summer sessions are counted here.
The table below splits them, and term averages across those 12 terms ran 2.23 to 3.54.
Historical grades for all professors, across recorded terms. The course summary above includes all professors.
- A+ 13 · 0.8%
- A 300 · 18.7%
- A- 280 · 17.5%
- B+ 289 · 18.0%
- B 289 · 18.0%
- B- 189 · 11.8%
- C+ 79 · 4.9%
- C 68 · 4.2%
- C- 34 · 2.1%
- D+ 8 · 0.5%
- D 15 · 0.9%
- D- 12 · 0.7%
- F 28 · 1.7%
- I 4 of 1,608
Percentages are of the 1,604 letter grades. Grey bars are non-letter outcomes: incompletes (I).
How the non-letter outcomes are counted
They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.
By instructor
| Instructor | Predicted GPA | Raw | n | Terms | A range | Workload | Spring 2026 |
|---|---|---|---|---|---|---|---|
| REIHER, PETER L reviews ↗ | 3.15 | 3.15 | 854 | 6 | 33% | heavy | not teaching it |
| EGGERT, PAUL RICHARD reviews ↗ | 3.11 | 3.11 | 374 | 3 | 39% | heavy | not teaching it |
| KUMAR, SAM reviews ↗ | 2.87 | 2.85 | 219 | 2 | 32% | average | not teaching it |
| XU, HARRY GUOQING reviews ↗ | 3.50 | 3.54 | 157 | 1 | 61% | - | not teaching it |
Why Predicted is not the Raw average
“Predicted” is shrunk toward the course average, which is itself shrunk toward the department, so an instructor with a handful of students sits near the course mean rather than topping the list.
Grade records describe outcomes. For what a course is like to take, read student reviews written on dibs below or follow the separate external review link.
Workload and assignments
Work types reported in BruinWalk reviews of this course, across recorded instructors and terms. They may differ from this term's syllabus.
What the work looks like
- Exams mentioned, no number given, said by 20 reviewers
- Quizzes mentioned, no number given, said by 1 reviewer
- Papers mentioned, no number given, said by 1 reviewer
- Problem sets mentioned, no number given, said by 1 reviewer
- Projects mentioned, no number given, said by 4 reviewers
- Labs mentioned, no number given, said by 9 reviewers
Read from 102 reviews 16 days ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.
What comes first
The chain dibs can see is 3 courses long before COM SCI 111. Read from Fall 2026, because dibs has not read a class page for COM SCI 111 in Spring 2026 and a department can change what it requires. dibs has read a class page for every course in it.
Counted in courses rather than quarters: dibs does not know which of them a department lets you take together.
In Springs
Ran in 4 of the last 4 Springs.
From the terms dibs holds, which start in Fall 2021 and exclude summer. A department can run a course in a quarter it never has before.
From the registrar's catalog
Lecture, four hours; laboratory, two hours; outside study, nine hours. Enforced requisites: courses 32, 33, 35L. Introduction to operating systems design and evaluation. Computer software systems performance, robustness, and functionality. Kernel structure, bootstrapping, input/output (I/O) devices and interrupts. Processes and threads; address spaces, memory management, and virtual memory. Scheduling, synchronization. File systems: layout, performance, robustness. Distributed systems: networking, remote procedure call (RPC), asynchronous RPC, distributed file systems, transactions. Protection and security. Exercises involving applications using, and internals of, real-world operating systems. Letter grading.
Sections in Spring 2026
From the people who took it
Student reviews
What taking COM SCI 111 was like: the work, the teaching, and what students wish they’d known.
Your experience could be the first.
No student reviews are available to read on dibs for this course yet. Took it? Tell the next person what helped, what was hard, and how you spent your time.
Looking for more perspectives?
External reviews are separate and do not count toward the dibs rating.