Table of Contents

1. Operating Systems (Winter 2021)

2. Computer Networks & Distributed Processing (Winter 2021)

3. Java Programming (Fall 2020)

4. Data Structures & Algorithm Analysis (Winter 2020)

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Overview of classroom-assignments

A single repository to rule them all. Placed here are all of the major programming assignments I've done previously during my undergraduate years at UoM Dearborn. I've organized them in terms of the respective class they were a part of and ordered these classes in terms of their recency.

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1. Operating Systems (Winter 2021)

For this course I was tasked with running xv6, an educational operating system, in a container using Docker to virtualize the process. All of the code written and modified was made in C in visual studio and ran/tested in a directory that both my host machine and xv6cp container could access.

Getting Docker Running

Follow the instructions from Docker's main website in order to properly install their software on your preferred operating system.
Installation page on DockerDocs.
Similar instructions on DockerHub.

Generating an xv6 docker process

My professor created an xv6 container image called shqwang/xv6 and stored it on his DockerHub repository.
You can find it here and the sequence of terminal commands I've placed below will add a local container process called xv6cp to your local machine.

1. The first terminal command does three things at once:
   

• First it names the container process as xv6cp
  
• Then it mounts a local directory called "xv6" under your PC's user name. This makes the directory accessible on both your host machine and the virtual machine
  
• Finally, it downloads the shqwang/xv6 container image. Replace "yourname" with the local username you use to login into your operating system
  
  (Linux & Apple users)
  $ docker run --name xv6cp -v /Users/yourName/xv6:/xv6 -it shqwang/xv6 bash
  
  (Windows users)
  $ docker run --name xv6cp -v /c/Users/yourName/xv6:/xv6 -it shqwang/xv6 bash
  
  

2. After all the files have fully downloaded, the '$' symbol should now have change into something along the lines of "root@4f8a09f17d24:/# ", which signifies you are in the container process. Since the container process is complete, you can now start building the xv6 operating system within it with the following commmands.
   
   First, copy the original source code copy of xv6 from within "xv6-public" into the previously created mounted folder "xv6". This gives you a way to back up your files in the event that you misplace or delete something important in the xv6 folder
   root@4f8a09f17d24:/# cp /xv6-public/* /xv6/

3. The following three commands allow you to access, build, and run the /xv6 directory

• root@4f8a09f17d24:/# cd /xv6
  
• root@4f8a09f17d24:/# make
  
• root@4f8a09f17d24:/# make qemu-nox

Thus, xv6 is ready and able to take on user made programs.
To shut down the xv6 container, press ctrl-a at the same time and then press x.

To get back into the xv6 container, type the commands:
$ docker restart xv6cp
$ docker attach xv6cp

Projects

For all three project, add the files from the operatingSystems repository into your xv6 folder in order to see the changes made to the original xv6 source code. This also includes adding new code that wasn't originally in xv6, such as spin.c and tc.c. To test it, run the command "$ spin 10000" to run it in the xv6 shell.

Project 1: Running a basic user program in xv6

Files: Makefile, spin.c

Project 2: Modifying xv6's scheduling policy

Files: Makefile, spin.c, proc.h, proc.c

Project 2: A traffic control user program

Files: Makefile, spin.c, proc.h, proc.c, tc.c

3. Computer Networks & Distributed Processing (Winter 2021)

All of the projects in this course were written in Java and are focused solely on socket clients and server programming. As such, these files can be run in any Java friendly IDEs, such as Intellij or Eclipse.

Both projects are online address books, with the main differentiation between the two versions is the addition of more features and interactivity between clients in the second version.

4. Java Programming (Fall 2020)

As the name implies, all project in this course were made in Java. Along with backend work, these softwares uses the GUI capabilities of Javafx in order to create interactive experiences between the user and the program.

The first project is a rock-paper-scissors spin-off game, the second is a postfix calculator, and the third project allows multiple users to interact with each other through a chatting software in real time.

5. Data Structures & Algorithm Analysis (Winter 2020)

Basic C++ programs that demonstrate common data sorting algorithms. This includes projects that implement binary search trees, splay trees, and merge sort algorithms.