IST AT4 Flashcards
What are the 3 main control structures?
Selection (basic) - one directed path
Selections (complex) - more than one path,2 or more choices
Repetitions(repeats) - loops algorithm specific number of times.includes processes, inputs outpus and decisions
How to write an if statement
IF ____ THEN
ENDIF
What are the 3 types of repeating processes
REPEAT UNTIL loop (known as POST TEST, or unguarded test)
WHILE loop (known as PRE TEST , or guarded loop)
FOR NEXT loop (counting loop, repeated certain number of times)
How do you write a post test or unguarded loop
REPEAT
Process
UNTIL __ = TRUE
How do you write a pre text or guarded loop
WHILE ____ = FALSE
Process
ENDWHILE
How do you write a counting loop
FOR I = 1 to 5 STEP 1
Display I
NEXT i
What is animation
Animation is the result of a series if graphics or frames presented in rapid succession
What is tweening?
Tweening is short for in-betweening, and when the program automatically generates the intermediate frames between 2 objects
What is path based animaiton
Animation that displays the movement of an animated object in a particular sequence
Cell based animation
Animation that involves drawing and displaying each frame or cell
What is the difference between morphing and warping
Warping - Transform or distorts a portion of an image
Morphing - Changes shape, size and dimension of an image
What is path based animation
Displaying the movement of an animated object onto a fixed background in a particular sequence or path, shape remains the same
What is the key frame?
The opening image if a compressed video sequence which contains all the data relating to the image. To compress, frames only contain data or what has changed from the key frame, reducing file size. Also show important moments and change in animation
What is selected data
The new changes of the keyframe that contain data of only the new old and old position
Two types of audio files in multimedia
Two main types of digital sound - digitalised sound files and musical instrument digital interface (MIDI) filed
Why is MIDI so small
MIDI does not store real world sounds. Instead, MIDI files contain digital descriptions of sounds produced by the musical instruments in the software or hardware and are predefined in form
What are the 5 elements of multimedia in increasing size?
Video, graphics, animation, audio and text
What are the 3 types of multimedia display devices
Liquid crystal displays - place liquid crystal between two polarising sheets. Current applies are various points, changing light transmission of specific crystal at that point
Cathode Ray tubes or visual display units control 3 electron focused beams one for RGB - striking tiny phosphor dots of pixel on monitor and causing them to glow
Plasma displays - use tiny fluroscent Rgb lights that are illuminated to create an image at different intensities
2 types of touchscreen
Infra red beams locates finger position and nowadays touch is monitored by electrical currents in screen layers
What are URL
Web pages are sent as Uniform resource locators which define the place of a Web pages on a specific server
Difference between internet and intranet
Internet is a public network while Intranet is a private network for showing specific
What is the difference between the World wide Web and the internet
The world wide Web are the pages that are on the network called the internet
Who developed the internet
Tim Berners-Lee
How do you comment in HTML, css and java
HTML- <!------>
CSS - /* */
JavaScript- //
Python - #
What is a proxy server
Computer used to block access to sites or cache (store) frequently used data.
Firewall
Hardware or software used to block access from attackers. They scan pockets of malicious code or attack vectors
Virus protection
They detect, quarantine and delete malicious code, preventing damage to your device
What is the difference between texts and hypertext
Text is data that consists of strings of printable characters separated by white space and other non-printing characters. Hypertext is simply text that acts as a link to another document or place on document.
2 types of hardware on multimedia
Backup display - DVDs and CDs
Display Hardware - Liquid Crystal display, Cathode Ray tube and plasma
What is analogue and digital data
Analogue- continuous data
Digital - discrete or fixed quanities
Data handling conversion
8 bits = 1 byte
1024 bytes = 1 kilobyte
1024 kilobytes = 1 megabyte
1024 megabytes = 1 gigabyte
1024 gigabytes = 1 terebyte
What is IDE
Integrated Development Environement
3 types of software
System software (Operating systems)
Application Software (apps)
Utility software (optimised and maintain computer functioning)
Software licencing
Retail: off thr shelf
ORM : Original Equipment Manufacturer, same as retail no nice box
Single licence : one device
Open source: free, changes shared
Concurrent source: Multiple licences rotated
Network licence: permission to install
SaaS: allowing people in organisation to access licence
Shareware: free trial software
Freeware: free, copyright still applies
3 types of tweening offered in Adobe animate
Classic tweening
Shape tween
Motion tween
What is the ISOC
The Internet Society created the transmission control protocol (TCP) wich are rules that allow for order and check transmission of data
What is htttp
Standard for hypertext transfer protocol allowed internet users to send and receive Web pages files
Image formats
TIFF- lossless image files do not lose quality when compressed big
Bitmap- exclusive to Windows, high quality no compression
Jpeg - Lossy format meaning that the image is compressed to make a smaller file popular on Web
Gif - lossless only limited to 256 colours can be animated small
Png - lossless images same as gif but 16million colours
Video and sound formats
Mp4 is lossy format
MPG is lossy format
WMV files are lossless
WAV sound files are lossless
MP3 is lossy
Common tags in html
<a> defines hyperlink</a>
<ul> unordered bullet point list
<ol> ordered numbered list
<li> defines list item
<b> Bold text
<body> Defines documents body
<br></br> single line break
<canvas> makes graphics
<div> section of a document
<em> italicised text
<footer> defines footer of a doc
<head> contains information about document between <html> and body
<img></img> inserts image
<link></link> used to link style sheets
<mark> highlights
<nav> navigational links
<p> paragraph
<style>
style info for document</style></p></nav></mark></html></head></footer></em></div></canvas></body></b></li></ol></ul>
