• Exam 1 Review, Review Partial Solutions
• Exam 2 Review, Review Partial Solutions
• Exam 3 Review, Review Partial Solutions
• ~csci131/practice - You can copy this folder to your home directory using the command:
       cp -r ~csci131/practice ~/practice
  Inside you will find several dozen practice exercises suitable for early in the semester, along with a text file explaining how to compile and run the exercises. There is also a sub-folder named solutions with some possible solutions, and sub-folder named more with somewhat longer and more challenging exercises, suitable for later in the semester when studying for the second exam.
• https://repl.it/@kevinawalsh/JavaExercises and https://repl.it/@kevinawalsh/MoreJavaExercises - These are online browser-based versions of the same exercises in the ~csci131/practice folder. Do not click on the "Request Edit Access" button. Instead you must create an account and "fork" the exercises. You can log in using your Google account, or make a new account. Then click "fork" on our exercises to create your own private copy of all the exercises, where you can edit, test, and save your work.
• Coding Bat Java Practice Exercises - These exercises are good once we have learned a little about functions, a few weeks into the semester.
• Textbook Website - Many exercises and often solutions as well.
• [NEW] edabit - Many, many exercises. Don't just look at the ones marked "Easy". In the sidebar, try "Medium", "Hard", or "Very Hard" as well. For example, this book-chapter problem is a very reasonable level for this exam.
• [NEW] Hacker Rank - The string, loop, and array exercises are reasonable, though fairly simple. Many of the rest things we have not covered in class (like System.in and Scanner.next()... we use StdIn.readString() instead), or are either very advanced or somewhat obscure and not useful.

CSCI 131 is fully in-person this semester. Even so, you may like to work remotely from your own computer, especially later in the semester as you work on larger individual projects outside of lab time. To do so, you will need to install certain (free) software on your own computer to access the computing resources we rely on. This page has extensive details on how to access our computing systems remotely. Specifically, for CSCI 131 typical minimum setup involves these steps:

1. First, follow these instructions to install Visual Studio Code and the associated Remote - SSH extension, and configure them to access our Linux server named logos. Test your connection to make sure you can log in to logos and browse the files in your home directory. This is the most user-friendly way to access and edit your logos files remotely.
2. Next, if you plan to work off campus or use HCGuest wifi or other untrusted networks, install the Holy Cross VPN..
3. Then, follow these instructions to learn how to use SSH to connect to logos. While you can use the remote-access features of Visual Studio Code for most things, there are times when it is helpful to have plain SSH instead. This is a more advanced and powerful access method. Follow the instructions to make sure you can log in to logos using SSH.
4. Lastly, follow these instructions to learn how to obtain full graphical remote access to logos. We won't need this for most work, only for a few particular projects that involve writing graphical programs.

Emacs and VIM Help

• Emacs hints & cheat sheet - if you use emacs and forget the basic key combinations.
• Emacs tutorial for beginners - if you want a step-by-step guide to using emacs.
• Vim tutorial for beginners - Vim is the major alternative to Emacs (nearly all serious "systems programmers" use one or the other). If you grow tired and frustrated with emacs, give vim a try. But beware: while emacs will drive you batty with command-shift-meta-whatever key combinations, you will probably find vim very unusual at first. So you should read a little about it before even trying to run it.

Online Java Editors and Compilers

Several programs let you try out short programs in java or many other languages right in the browser. Here are some popular ones. Just select java from the language menu, type or paste in your code, and click submit to compile and run it. Note: These compilers are not guaranteed to match the exact version of java we use on our server. You are responsible for checking that all your code compiles and runs properly on logos. On the other hand, for quick testing, these sites can be handy.

• repl.it is a popular online editor and compiler that supports Java and dozens of other languages.
• tutorialspoint coding ground is probably the nicest of the online compilers I have seen, with a large editor, and a shell at the bottom where you can run and interact with the program.
• ideone.com offers lots of languages. It seems a tad slow compiling.
• codepad.org offers many languages too, and it is quick. But you can't specify the program's input at all.