Chapter 1 Flashcards
Digital Data is represented by…
Text, #s, graphs, sounds and videos converted into digits
What type of data is used to reflect an infinite scale of values?
Analog Data
The conversion of information into digital data that can be manipulated by electronic devices is…
Digitization
0 or 1 used in digital representation of data
bit (binary digit)
Numeric data uses numbers for what kind of mathematical operations?
Arithmetic operations (ex: ssn, telephone #)
Binary systems consists of which two digits?
0 and 1
Collection of data on storage (ex: flash drive, cd) is referred to as a…
File
.mp3 is a form of what?
Format
What kind of data that is not used in calculatoins?
Character Data (name, eye color)
What is ASCII (Askee)?
American Standard Code for information interchange. It uses 7 bits for 1 character.
Unformatted text is called … (.txt)
ASKII text
Extended ASCII uses how many bits per character
8 bites / character (holds up to 256 characters)
Unicode uses how many bits / character?
16 bits / character. (up to 65,000 characters)
**used for multiple languages
What type of character data uses 7 bits (ASCII) but 16 bit as necessary (unicode).
UTF-8
What do these signify ( < > // )? What are they called?
Start / Stop
Delimiters
How many bits equal a Byte?
8 bits = 1 Byte
The technology that recodes data is…
Data Compression (.zip)
What are two parts of reconstituting files?
Extracting and Unzipping
Which type of data compression keeps the information the same?
Lossless Data Compression
Lossy Data Compression means…
That the files will not be exactly the same.
Give 3 examples of domain names
.com .net .org
Music, speech and sounds represented in binary format to be used in digital devices (typically through a mic) is…
Digital Audio
Each cell of dots or rectangles that represents a picture element which holds color
Pixel
What are the 3 essential languages?
HTML, CSS and JS
