fs: remove quiz. No time for that :sad: 😥
git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@211 a672b425-5310-4d7a-af5c-997e18724b81
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---
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layout: page
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category: Filesystem
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tags: Hard links
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author: Ricardo Vivanco
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title: fs
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previous-page: pages/fs/Hard
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---
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<html>
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<head>
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</head>
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<body>
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<header>
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<h1>Hard and Symbolic links</h1>
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<p>In Unix-like operating systems such as Linux, “everything is a file” and a file
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is fundamentally a link to an inode (a data structure that stores everything about a
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file apart from its name and actual content).
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A hard link is a file that points to the same underlying inode, as another file.
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In case you delete one file, it removes one link to the underlying inode. Whereas a
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symbolic link (also known as soft link) is a link to another filename in the filesystem.
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Another important difference between the two types of links is that hard links can only
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work within the same filesystem while symbolic links can go across different filesystems.
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</p>
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</header>
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</body>
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</html>
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---
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layout: page
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category: Filesystem
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tags: Hard links
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author: Ricardo Vivanco
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title: fs
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previous-page: pages/fs/Hard:symbolic_links.html
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---
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<html>
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<head>
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</head>
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<body>
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<header>
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<h1>How to Create Hard Links in Linux</h1>
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<p>To create a hard links in Linux, we will use ln utility. For example, if you want
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to create a hard link named "hard_link1" to the file "file1" you can use first
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the <code> ls <code> <code> -l <code> command in order to see all files. Then you
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write <code> ln <code> "file1" "hard_link1" and after that if you write down again
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<code> ls <code> <code> -l <code> you can finally see the hard link named "hard_link1"
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created. Looking at that output, using <code> ls <code> command, the new file is not indicated
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as a link, it is shown as a regular file. This implies that "hard_link1" is just another
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regular executable file that points to the same underlying inode as "file1".
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If you desire to make a hard link directly into a soft link, use the <code> -P <code> flag
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like this: <code> ln <code> <code> -P <code> "file1" "hard_link1"
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</p>
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</header>
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</body>
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</html>
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---
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layout: page
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category: File System
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tags: absolute relative path
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author: Marwan Announ
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title: fs
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---
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<p>
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<h1>ABSOLUTE VS RELATIVE</h1>
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<p>
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Now, you can ask, why I have to use one or another?
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<br> What is the difference? and questions like this.
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<br> <br> <br> Don't worry, the answer it's easy.., we can use an absolute path from any location
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<br> whereas you want to use relative path we should be present that you have to be in the working directory.
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</p>
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<br><br><br>We suppose that now you know the differences between both, but, what is the vantages and disadvantages?
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<br> <br> <br>
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<h3> Pro and Cons of using Absolute and Relative </h3>
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<pre>
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<br>1)Absolute paths are clearer: who will have to maintain/modify your script (you or others) will be able to know
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<br>every time what directories are involved;
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<br><br>2)With absolute paths you are sure the involved directories are the one with the exact path you are writing
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<br>in the script;
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<br><br>3)Relative paths are shorter, but you need to be sure of the subtree you're working into;
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<br><br>4)You can achieve shortness replacing recurring paths with a variable at the beginning of the script
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<br><br>
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(e.g. /var/log/app/component/module/logfile.log -> $module_log_dir/logfile.log)
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</pre>
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<!-- quiz about absolute vs relative, where the user have to choose one or another(javascript) -->
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<h3> I'm sure that if you read this for two or more times you will be able to pass the quiz </h3>
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Yeah, right, there is a quiz.
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<br> The best way to learn something it's not the theory, in fact you have to do some practice, if you click
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<br> the button "QUIZ", you can try to do a quiz in order to check what you've just read.
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<br><br><br> Don't worry it's for you, good luck
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<br><br><br> * for css, please try to do a button or layout to links the quiz*
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</p>
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<!-- quiz di javascript pronto che linkero -->
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<!--
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<link href ="style.css" rel ="stylesheet">
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<link href="https://fonts.googleapis.com/css?family=Lato" rel="stylesheet">
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<script src = "main.js"></script>
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</head>
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<body>
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<h1>Are you ready for the quiz?</h1>
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<form id = "quiz" name = "quiz">
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<p class = "questions">What is path?</p>
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<input type = "radio" id = "mc" name = "question1" value = "Is a location to a folder or file in a file system of a Operating System"> Is a location to a folder or file in a file system of a Operating System<br>
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<input type = "radio" id = "mc" name = "question1" value = "Is an Operating System"> Is an Operating System<br>
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<input type = "radio" id = "mc" name = "question1" value = "Is a folder that you can find on your Operating System"> Is a folder that you can find on your Operating System<br>
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<p class = "questions">What is an absolute path?</p>
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<input type = "radio" id = "mc" name = "question2" value = "The bigger folder that you can find on your Operating System"> The bigger folder that you can find on your Operating System<br>
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<input type = "radio" id = "mc" name = "question2" value = "Is defined as specifying the location of a file or directory from the root directory(/)"> Is defined as specifying the location of a file or directory from the root directory(/)<br>
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<input type = "radio" id = "mc" name = "question2" value = "The last location of a file or directory from Documents"> The last location of a file or directory from Documents<br>
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<p class = "questions">"cat /home/a1/group1.txt" it's an example of absolute path?</p>
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<input type = "radio" id = "mc" name = "question3" value = "YES"> YES <br>
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<input type = "radio" id = "mc" name = "question3" value = "NO"> NO <br>
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<p class = "questions">If you choose "NO" why it's not correct? if you think it's correct don't write anything</p>
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<input id = "textbox" type = "text" name = "question4">
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<p class = "questions">"pwd/home/user1cd Documents" it's an example of relative path?</p>
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<input type = "radio" id = "mc" name = "question5" value = "YES"> YES <br>
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<input type = "radio" id = "mc" name = "question5" value = "NO"> NO <br>
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<br><br><input id = "button" type = "button" value = "Finish? Sure!?" onclick = "check();">
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</form>
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<div id = "after_submit">
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<p id = "number_correct"></p>
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<p id = "message"></p>
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<img id = "picture">
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</div>
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-->
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body {
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font-family: 'Lato', sans-serif;
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}
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#quiz {
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margin-left: 10px;
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background: #d2def2;
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padding: 10px 20px 10px 20px;
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width: 400px;
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border-radius: 20px;
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float: left;
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}
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input {
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margin-bottom: 20px;
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display: block;
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}
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#textbox {
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height: 25px;
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font-size: 16px;
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border-radius: 5px;
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border: none;
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padding-left: 5px;
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}
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#button {
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background: green;
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border: none;
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border-radius: 5px;
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padding: 10px;
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color: white;
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font-size: 16px;
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transition-duration: .5s;
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margin-top: 15px;
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}
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#button:hover {
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background: white;
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border: 1px solid green;
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color: black;
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cursor: pointer;
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}
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#after_submit {
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visibility: hidden;
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background: #ff5459;
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padding: 10px 20px 10px 20px;
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width: 400px;
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border-radius: 20px;
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float: left;
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margin-left: 20px;
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font-size: 30px;
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}
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#picture {
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width: 375px;
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height: 245px;
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}
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#mc {
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display: inline;
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}
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<!DOCTYPE html>
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<html>
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<head>
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<title> SA group-1 </title>
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<link href ="style.css" rel ="stylesheet">
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<link href="https://fonts.googleapis.com/css?family=Lato" rel="stylesheet">
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<script src = "main.js"></script>
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</head>
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<body>
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<h1>Are you ready for the quiz?</h1>
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<form id = "quiz" name = "quiz">
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<p class = "questions">Which of the two groups are better?</p>
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<input id = "textbox" type = "text" name = "question1">
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<p class = "questions">What is unix?</p>
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<input type = "radio" id = "mc" name = "question2" value = "A dog"> A dog<br>
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<input type = "radio" id = "mc" name = "question2" value = "A type of.."> A type of..<br>
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<p class = "questions">What is absolute path?</p>
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<input type = "radio" id = "mc" name = "question3" value = "A type of.."> A type of..<br>
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<input type = "radio" id = "mc" name = "question3" value = "A Dog"> A dog<br>
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<br><br><input id = "button" type = "button" value = "Finish? Sure!?" onclick = "check();">
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</form>
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<div id = "after_submit">
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<p id = "number_correct"></p>
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<p id = "message"></p>
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<img id = "picture">
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</div>
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</html>
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</body>
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function check(){
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var question1 = document.quiz.question1.value;
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var question2 = document.quiz.question2.value;
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var question3 = document.quiz.question3.value;
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var correct = 0;
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if (question1 == "group1") {
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correct++;
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}
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if (question2 == "A type of..") {
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correct++;
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}
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if (question3 == "A type of..") {
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correct++;
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}
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var pictures = ["img/win.gif", "img/meh.jpeg", "img/lose.gif"];
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var messages = ["Great job!", "That's just okay", "You really need to do better"];
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var score;
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if (correct == 0) {
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score = 2;
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}
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if (correct > 0 && correct < 3) {
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score = 1;
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}
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if (correct == 3) {
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score = 0;
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}
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document.getElementById("after_submit").style.visibility = "visible";
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document.getElementById("message").innerHTML = messages[score];
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document.getElementById("number_correct").innerHTML = "You got " + correct + " correct.";
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document.getElementById("picture").src = pictures[score];
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}
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function check(){
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var question1 = document.quiz.question1.value;
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var question2 = document.quiz.question2.value;
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var question3 = document.quiz.question3.value;
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var question4 = document.quiz.question4.value;
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var question5 = document.quiz.question5.value;
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var correct = 0;
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if (question1 == "Is a location to a folder or file in a file system of a Operating System") {
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correct++;
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}
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if (question2 == "Is defined as specifying the location of a file or directory from the root directory(/)") {
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correct++;
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}
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if (question3 == "YES") {
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correct++;
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}
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if (question4 == "") {
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correct++;
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}
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if (question5 == "YES") {
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correct++;
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}
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var pictures = ["img/win.gif", "img/meh.jpeg", "img/lose.gif"];
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var messages = ["Great job!", "That's just okay", "You really need to do better"];
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var score;
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if (correct == 0) {
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score = 4;
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}
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if (correct > 0 && correct < 5) {
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score = 3;
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}
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if (correct == 5) {
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score = 0;
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}
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document.getElementById("after_submit").style.visibility = "visible";
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document.getElementById("message").innerHTML = messages[score];
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document.getElementById("number_correct").innerHTML = "You got " + correct + " correct.";
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document.getElementById("picture").src = pictures[score];
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}
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