Digital Data Representation Basics
The smallest unit of data a computer can recognize
A bit
The main case of a computer or mobile device
System unit
The coding system that is traditionally used with personal computers
ASCII
(American Standard Code for Information Interchange)
The numbering system we commonly use, comprised of 10 symbols, to represent all possible numbers
Decimal numbering system
The shortened form of "picture elements"
Pixels
Eight bits grouped together
Byte
To convert analog sound to digital sound, how many samples are taken every second?
Several thousand
A universal international coding standard designed to represent text-based data written in any ancient or modern language, including those with different alphabets
Unicode
Each place value in a binary number represents ____ raised to the appropriate power.
2
An image made of a grid of small dots that are colored appropriately to represent an image
Bitmap image
Digital computers can understand only two states: ______ and _____ represented by ____ and ____.
On and off, 1 and 0
1,000 bytes
Kilobyte (KB)
_________ is replacing ______ as the primary text-coding system.
Unicode, ASCII
A(n) ____________ instruction might look like a meaningless string of 0s and 1s, but it actually represents specific operations and storage locations.
Machine language
Each pixel in a __________ ___________ can be only one of two possible colors.
Monochrome graphic
All data processed by a computer must be in __________ form
Binary
Files that are ________ are about ten times smaller than their un________ digital versions, so they download ten times faster and take up one-tenth of the storage space.
Compressed
A code developed by IBM, primarily for use with mainframes
EBCDIC
(Extended Binary-Coded Decimal Interchange Code)
True or false: early computers allowed programs to be written in a programming language, which was then translated by the computer into machine language.
FALSE! Early computers required programs to be written in machine language.
The ______ images taken by most digital cameras today use 24-bit true-color images. (Looking for an image format)
JPEG
The process of representing data in a form that can be understood by a digital computer
Digital data representation
The storage size of an audio file depends on the ____ ______ (the number of bits to be transferred per second when the file is played) used when the file is initially created.
bit rate
Most recent software programs, including the latest versions of Microsoft Windows, Google, OS X, and Microsoft Office use _______ as the primary text-coding system.
Unicode
Before a computer can execute any program instruction, it must convert the instruction into ____________.
Machine language
A data type that is using a collection of frames, each frame consisting of a still image.
Video data