Cheatography
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Machine Cycle/Processing Cycle
Fetch - Retrieves the next program instruction from memory. |
Decode - Determines what the program is telling the compy to do. |
Execute - Performs the requested instruction. |
Store - Stores the results to an internal register or to memory. |
Basic HTML Structure
<!DOCTYPE html>
<html>
<head>
<title>website title</title>
</head>
<body>
content of website ...
</body>
</html>
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Random Bytes
*Bit = Smallest piece of data a compy works with
*8 Bits = 1 byte aka a single unit of storage
*Binary Data = written in 1s and 0s |
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System Unit Main Components
Motherboard |
Internal Speaker |
CPU |
Drive Bays |
Power Supply |
Expansion Slots |
Cooling Fan |
Abbreviations
CSS - Cascading Style Sheet |
HTML - Hyper Text Markup Language |
CPU - Central Processing Unit |
VoIP - Voice over Internet Protocol |
LAN - Local Access Network |
WAN - Wide Area Network |
POST - Power-on Self-Test |
CMOS - Comp. Metal Oxide Semiconductor |
BIOS - Basic input/Output Sys. |
Access 2013
4 Objects = Tables, Forms Queries & Reports |
Rows = Records, Columns = Fields |
JavaScript/HTML Thing
<form></form> |
<input></input> = within form |
"document.write" to print |
alert - simple popup window w/ ok button |
onClick = event that's triggered when a user clicks something |
<script></script> |
Conditional Statements (if/else) |
if (something happens){takes action} |
Call Function by using its name & listing constants |
else{takes a different action} |
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6 Steps of Booting a System
1.) BIOS (Basic Input/Output System) is load |
2.) Power-on self test (POST) is completed |
3.) OS is loaded |
4.) System Configuration is accomplished |
5.) System utilities are loaded |
6.) User is authenticated |
Memory Bank
RAM (Random Access Memory)
*Volatile
*Temporarily stores data & instructions for CPU
Cache Memory
*Small unit of ultrafast memory built into or near the processor
*Stores frequently or recently access info
*3 Lvls. = L1 (primary), L2 (secondary), L3
ROM (Read-only Memory)
*Nonvolatile
*BIOS - 1st code when compy is powered on
*CMOS - Starts the power-on self-test
POST - checks circuitry & RAM
Bootstrap Loader - locates & loads OS into RAM |
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HTML Basics
<h_> </h_> |
Heading (h1-h6) |
<b></b> |
bold |
<a href="url"></a> |
Create a link |
<img src="filename.jpg"> |
Show an Image |
<ul><li>list</li></ul> |
Unordered, bullet-point list |
<ol><li>list</li></ol> |
Ordered List |
<table></table> |
Define a Table |
<tr></tr> |
Table Row within table |
<th></th> |
header cell within table row |
<td></td> |
Table cell within table row |
3 Ways to Insert CSS
1.) External Style Sheet - link to style sheet in the HTML file. |
2.) Internal Style Sheet - put in the HTML file; put the style section in the header section. |
3.) Inline Styles - Add the style formatting in the desired line by "style=". |
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