vault backup: 2024-04-21 22:58:56

.obsidian/community-plugins.json

@@ -6,5 +6,6 @@
   "obsidian-diagrams-net",
   "obsidian-full-calendar",
   "obsidian-style-settings",
-  "url-into-selection"
+  "url-into-selection",
+  "obsidian-csv-table"
 ]

.obsidian/plugins/obsidian-csv-table/manifest.json

@@ -0,0 +1,10 @@
+{
+	"id": "obsidian-csv-table",
+	"name": "CSV Table",
+	"version": "1.2.0",
+	"minAppVersion": "0.11.10",
+	"description": "Render CSV data as a table within your notes.",
+	"author": "Adam Coddington <me@adamcoddington.net>",
+	"authorUrl": "https://coddingtonbear.net/",
+	"isDesktopOnly": false
+}

.obsidian/plugins/obsidian-csv-table/styles.css

@@ -0,0 +1,8 @@
+.csv-table {
+  width: 100%;
+}
+.csv-error {
+  font-weight: 700;
+  padding: 10em;
+  border: 1px solid #f00;
+}

.obsidian/workspace.json

@@ -25,7 +25,7 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "Semester 2/Database Systems/Trimester 2 Assignment.md",
+                "file": "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/Trimester 2 Assignment.md",
                 "mode": "source",
                 "source": false
               }
@@ -99,7 +99,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "Semester 2/Database Systems/Trimester 2 Assignment.md",
+                "file": "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/Trimester 2 Assignment.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -116,7 +116,7 @@
             "state": {
               "type": "outgoing-link",
               "state": {
-                "file": "Semester 2/Database Systems/Trimester 2 Assignment.md",
+                "file": "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/Trimester 2 Assignment.md",
                 "linksCollapsed": false,
                 "unlinkedCollapsed": true
               }
@@ -139,7 +139,7 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "Semester 2/Database Systems/Trimester 2 Assignment.md"
+                "file": "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/Trimester 2 Assignment.md"
               }
             }
           },
@@ -181,38 +181,39 @@
   },
   "active": "3ed058b7ba32ddc0",
   "lastOpenFiles": [
-    "images/Pasted image 20240417140336.png",
+    "images/Pasted image 20240421224020.png",
-    "images/Pasted image 20240417140243.png",
-    "Semester 2/Database Systems/Week 11/Week 11 Database Systems.md",
     "Semester 2/Database Systems/Trimester 2 Assignment.md",
+    "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/Trimester 2 Assignment.md",
+    "images/Pasted image 20240421194501.png",
+    "images/Pasted image 20240421190116.png",
+    "1b.csv",
+    "1a.csv",
+    "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/1a.csv",
+    "images/Pasted image 20240421172016.png",
+    "images/Pasted image 20240421171351.png",
+    "images/Pasted image 20240421171345.png",
+    "images/Pasted image 20240421171300.png",
+    "images/Pasted image 20240421171121.png",
+    "images/Pasted image 20240421170953.png",
+    "images/Pasted image 20240421170326.png",
+    "images/Pasted image 20240421165326.png",
+    "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/q2.sh",
+    "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/q1txt2.txt",
+    "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/q1txt1.txt",
+    "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/q1.sh",
+    "Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment",
+    "Semester 2/Database Systems/Week 11/Week 11 Database Systems.md",
     "Semester 2/Database Systems/Exercise Booklet.pdf",
     "Semester 2/Database Systems/Week 11",
-    "Semester 2/Untitled",
     "Semester 2/Database Systems/Week 10/Week 10 Database Systems.md",
     "Semester 2/Database Systems/Week 9/Week 9 Database Systems.md",
     "Semester 2/Database Systems/Week 8/Week 8 Database Systems.md",
-    "images/Pasted image 20240415190127.png",
-    "images/Pasted image 20240415190010.png",
-    "images/Pasted image 20240415175614.png",
-    "images/Pasted image 20240415135455.png",
-    "images/Pasted image 20240415134042.png",
     "Semester 2/Programming 2/Week 10 Revision/Q5.md",
     "Semester 2/Programming 2/Assessment 3 Revision/Parameter Passing WS2.md",
     "Semester 2/Programming 2/Assessment 3 Revision/Parameter Passing WS1.md",
     "Semester 2/HCI/Week 3/Week 3 Human Computer Interfaces.md",
     "Semester 2/Programming 2/Assessment 3 Revision/Parameter Passing WS3.md",
-    "Semester 2/Programming 2/Project/Part 2/package.bluej",
-    "Semester 2/Programming 2/Project/Part 2",
-    "Semester 2/Programming 2/Project/Part 4 Complete.zip",
-    "Semester 2/Programming 2/Project/Part 4 Complete/doc/resources/inherit.gif",
-    "Semester 2/Programming 2/Project/Part 4 Complete/doc/stylesheet.css",
-    "Semester 2/Programming 2/Project/Part 4 Complete/doc/resources",
-    "Semester 2/Programming 2/Project/Part 4 Complete/doc/package-summary.html",
-    "Semester 2/Programming 2/Project/Part 4 Complete/doc/package-list",
-    "images/Pasted image 20240319234142.png",
-    "images/Pasted image 20240319225420.png",
     "Semester 2/Programming 2/Week 10 Revision/Q4.md",
-    "images/Pasted image 20240319224232.png",
     "Semester 2/Programming 2/Week 10 Revision/Q3.md",
     "Semester 2/Programming 2/Week 10 Revision/Q1.md",
     "Semester 2/Database Systems/Week 2/Week 2 Database Systems.md",
@@ -223,7 +224,6 @@
     "Semester 2/Database Systems/Week 7/Week 7 Database Systems.md",
     "Semester 2/Database Systems/Week 6/Week 6 Database Systems.md",
     "Semester 2/Computer Systems Internals & Linux/Week 6/Week 6 Computer Systems Internals.md",
-    "Semester 2/Computer Systems Internals & Linux/Untitled.md",
     "Semester 2/Database Systems/Week 5/Week 5 Database Systems.md",
     "Semester 2/HCI/Week 2/Week 2 Human Computer Interfaces.md",
     "Semester 1/Database Systems/Week 11/Week 11 Database Systems.md",

1a.csv

@@ -0,0 +1,9 @@
+A,B,C,XOR1,OR,NAND,NOT,XOR2,X
+0,0,0,0,0,1,1,0,0
+0,0,1,0,1,1,0,1,1
+0,1,0,1,1,0,1,1,1
+0,1,1,1,1,0,0,0,0
+1,0,0,1,0,1,1,0,0
+1,0,1,1,1,0,0,0,0
+1,1,0,0,1,1,1,0,0
+1,1,1,0,1,1,0,1,1

1b.csv

@@ -0,0 +1,9 @@
+IN1,IN2,IN3,OUT
+0,0,0,1
+0,0,1,1
+0,1,0,0
+0,1,1,0
+1,0,0,0
+1,0,1,0
+1,1,0,1
+1,1,1,1

Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/Trimester 2 Assignment.md

@@ -0,0 +1,232 @@
+| Roll Number | 00677611 |
+| ----------- | -------- |
+| ID          | CHC119   |
+
+# 1 - Linux Bash
+
+### 1.1 - If Statements
+
+![](Pasted%20image%2020240421152012.png)
+![](Pasted%20image%2020240421151943.png)
+
+### 1.2 - Processing Variable Number of Arguments with While, Using if
+
+![](Pasted%20image%2020240421161729.png)
+![](Pasted%20image%2020240421161749.png)
+
+# 2 - Linux System Administration
+
+#### Setup:
+
+- Create **sysadmin** user:
+  ![](Pasted%20image%2020240421162622.png)
+- Add **sysadmin** to the **root** group
+  ![](Pasted%20image%2020240421162657.png)
+- Create global_aliases.sh and set permissions
+  ![](Pasted%20image%2020240421170953.png)
+- Create aliases:
+  ![](Pasted%20image%2020240421171121.png)
+- Add source for existing users:
+  ![](Pasted%20image%2020240421171300.png)
+- Create users:
+  ![](Pasted%20image%2020240421163023.png)
+  ![](Pasted%20image%2020240421163115.png)
+  ![](Pasted%20image%2020240421163226.png)
+- Create group for Hugh and Ryan
+  ![](Pasted%20image%2020240421163525.png)
+- Add Hugh and Ryan to the group
+  ![](Pasted%20image%2020240421163651.png)
+- Create shared directory
+  ![](Pasted%20image%2020240421163552.png)
+- Set permissions to directory to allow root and sharedaccess to read, write and execute, others can read
+  ![](Pasted%20image%2020240421164145.png)
+  ![](Pasted%20image%2020240421164122.png)
+  ![](Pasted%20image%2020240421163852.png)
+- Set permissions of all folders in /home/ to rwx for exclusively the user that owns it. Other users may not read, write or execute
+   ![](Pasted%20image%2020240421164526.png)
+   ![](Pasted%20image%2020240421164507.png)
+
+#### Testing:
+
+##### Aliases
+
+- Test **ll** alias:
+  ![](Pasted%20image%2020240421162846.png)
+- Test **la** alias:
+  ![](Pasted%20image%2020240421162908.png)
+- Test other uses can use alias:
+  ![](Pasted%20image%2020240421171351.png)
+
+##### Shared Directory:
+
+- Both Ryan and Hugh can read and write inside the shared directory.
+  ![](Pasted%20image%2020240421164724.png)
+
+- Rob can read from the directory:
+  ![](Pasted%20image%2020240421170326.png)
+
+- Rob cannot write to the directory:
+  ![](Pasted%20image%2020240421165326.png)
+
+##### Home Directories:
+
+- Users cannot access each other's home directories.
+  ![](Pasted%20image%2020240421164909.png)
+  ![](Pasted%20image%2020240421165151.png)
+  ![](Pasted%20image%2020240421165256.png)
+
+- However, the owner may access the home directory.
+  ![](Pasted%20image%2020240421165222.png)
+  ![](Pasted%20image%2020240421164948.png)
+
+#### bash_history
+
+# CSI Task 1
+
+### a)
+
+![](Pasted%20image%2020240421172016.png)
+
+#### i)
+
+```
+X = (A ∧ B ∧ C) ∨ ( ¬A ∧ B ∧ ¬C) ∨ ( ¬A ∧ ¬B ∧ C)
+```
+
+#### ii)
+
+```csvtable
+source: 1a.csv
+```
+
+### b)
+
+Truth Table:
+
+```csvtable
+source: 1b.csv
+```
+
+Karnaugh Graph:
+
+|     |     | AB  |     |     |     |
+| --- | --- | --- | --- | --- | --- |
+|     |     | 00  | 01  | 11  | 10  |
+| C   | 0   | 1   | 0   | 1   | 0   |
+|     | 1   | 1   | 0   | 1   | 0   |
+
+As we can see from the Karnaugh Graph, the output of C is completely irrelevant.
+
+Boolean Expression:
+
+```
+OUT = (IN1 ∧ IN2) ∨ ( ¬IN1 ∧ ¬IN2)
+```
+
+Logic Circuit:
+
+![](Pasted%20image%2020240421190116.png)
+
+# CSI Task 2
+
+### a)
+
+| Name    | George                                                                                   |
+| ------- | ---------------------------------------------------------------------------------------- |
+| Decimal | 71,101,111,114,103,101                                                                   |
+| Binary  | 1000111,1100101,1101111,1110010,1100111,1100101                                          |
+| 8N2     | 0(Idle) 1(Start) 01000111 00(Stop) 1(Start) 01100101 00(Stop) 1(Start) 01101111 00(Stop) |
+|         | 1(Start) 01110010 00(Stop) 1(Start) 01100111 00(Stop) 1(Start) 01100101 00(Stop) 0(Idle) |
+
+- ![](Pasted%20image%2020240421194501.png)
+
+### b)
+
+| Sent     | UTF-8 | Binary       | UTF-8 | Received |
+| -------- | ----- | ------------ | ----- | -------- |
+| G        | 71    | 0100 0111    | 71    | G        |
+| e        | 101   | 0110 0101    | 101   | e        |
+| o        | 111   | 0110 1111    | 111   | o        |
+| r        | 114   | 0111 0010    | 114   | r        |
+| g        | 103   | 0110 0111    | 103   | g        |
+| e        | 101   | 0110 0101    | 101   | e        |
+| Sum      | 601   | 10 0101 1001 | 601   |          |
+| Checksum | 89    |              | 89    |          |
+
+601 $mod$ 256 = 89
+or,
+10 0101 1001 AND
+00 1111 1111
+00 0101 1001 = 89
+
+Example:
+
+| Sent     | UTF-8 | Binary        | UTF-8 | Received |
+| -------- | ----- | ------------- | ----- | -------- |
+| G        | 71    | 0100 0111     | 71    | G        |
+| e        | 101   | 011**1** 0101 | 117   | u        |
+| o        | 111   | 0110 11**0**1 | 109   | m        |
+| r        | 114   | 0111 0010     | 114   | r        |
+| g        | 103   | 01**0**0 0111 | 71    | G        |
+| e        | 101   | 0110 0101     | 101   | e        |
+| Sum      | 601   | 10 0100 0111  | 583   |          |
+| Checksum | 89    |               | 71    |          |
+
+Here we can detect an error in transmission, since the checksum differs on each side of the message. A checksum however cannot detect *where* an error occurs, just the fact that it has.
+
+### c)
+
+$Baud Rate = \frac{Bitrate}{Bits Per Symbol}$
+
+$Bit Rate = 2MBps$
+$Bits Per Symbol = 8 data + 1 start + 2 stop = 11 bits$
+
+$Baud Rate = \frac{2MBps}{11b} = 0.1818MHz = 181.8kHz$
+
+$5F = 5 * \frac{Baud Rate}{2}$
+$5F = 5 * 90.9kHz = 454.5kHz$
+
+Required Bandwidth: 454.5kHz
+
+# CSI Task 3
+
+### a)
+
+#### Page Accesses
+
+1. 1 2 3 4 5
+2. 2 3 4 1 5
+3. 3 4 1 2 5
+
+![](Pasted%20image%2020240421224020.png)
+
+Using the clock algorithm, there are 7 page faults total with this sequence of page accesses.
+
+### b)
+
+Since A has a runtime of 4 seconds, it is impossible to allocate 4-7 (4, 5, 6, 7 -> 5 processes) second runtime with no conflicts, so I will allocate 4 in a process of my choice.
+
+$Response Ratio = \frac{Wait Time + Run Time}{Run Time}$
+
+| Process | Runtime | Start Time | Response Ratio |
+| ------- | ------- | ---------- | -------------- |
+| A       | 4       | 0          | 1              |
+| B       | 5       | 1          | 1.2            |
+| C       | 6       | 2          | 1.33           |
+| D       | 7       | 3          | 1.43           |
+| E       | 4       | 4          | 2              |
+
+Process E has the highest Response Ratio, and will be scheduled first.
+Then Process D, Process C, B and finally A.
+
+| t (Time) | Complete Process | Start Process |
+| -------- | ---------------- | ------------- |
+| 0        |                  | A             |
+| 4        | A                | E             |
+| 8        | E                | D             |
+| 15       | D                | C             |
+| 21       | C                | B             |
+| 26       | B                |               |
+
+Since the only available process at t=0 is A, it must still be performed first, regardless of where it sits in the queue.
+E is then available at t=4, when A is completed, allowing the remaining queue to run in descending order of response ratio.

Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/q1.sh

@@ -0,0 +1,22 @@
+#!bin/bash
+
+if [ $# -ne 2 ]; then
+	echo "Please provide 2 files as arguments"
+	exit 1
+fi
+
+if [ ! -f "$1" ] || [ ! -f "$2" ]; then
+	echo "Both arguments must be files"
+	exit 1
+fi
+
+print() {
+	file="$1"
+	echo "$file"
+	head -n 2 "$file"
+}
+
+print "$1"
+print "$2"
+
+echo "Total number of characters is: $(cat "$1" "$2" | wc -c)"

Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/q1txt1.txt

@@ -0,0 +1,3 @@
+1
+2
+3

Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/q1txt2.txt

@@ -0,0 +1,8 @@
+4
+5
+6
+7
+8
+9
+10
+11

Semester 2/Computer Systems Internals & Linux/Trimester 2 Assignment/q2.sh

@@ -0,0 +1,25 @@
+#!bin/bash
+
+if [ $# -ne 6 ]; then
+	echo "Please provide 6 arguments"
+	exit 1
+fi
+
+total=0
+count=0
+
+marks=("$@")
+# Expands the list of arguments to be space seperated, then splits the output
+# on a space with a newline. The list is then sorted in descending order.
+# This allows the iteration through the list until count = length=1, removing
+# the last value from the calculation.
+marks=($(echo "${marks[@]}" | tr ' ' '\n' | sort -nr))
+
+while [ "$count" -lt 5 ]; do
+	total=$((total + marks[count]))
+	count=$((count + 1))
+done
+
+avg=$(( ( total + 5 / 2 ) / 5 ))
+
+echo "Average of best five modules: $avg%"