Data Rep Flashcards
(30 cards)
What is a bit
The smallest unit of data
A bit can be 1 or 0
What is a nibble
4 bits
It stores values from 0000 to 1111
What is a byte
8 bits
00000000 to 11111111 (255)
What Is a kilobyte
1000 bytes (10^3 bytes)
Roughly one full a4 page of text
What is 1mb
1000 kilobites
What is one gigabyte
1000 megabytes
What is a terabyte
1000 gigabytes
What is an overflow error
When a computer cannot store the result of a calculation in the memory allocated for the task
What is a binary shift to the right
Half’s the number
What is a binary shift to the left
Doubles the number
List all the hex characters
1,2,3,4,5,6,7,8,9,a,b,c,d,e,f
What is ascii
American standard code for information interchange
What is the character set of a computer
The characters available to the computer system
How does ascii represent text in a computer system
Each character has a unique code for the computer
What is resolution
How tightly packed the pixels are (pixels per inch)
What is colour depth
The number of bits determines the range of colours
Number of colours is 2 to the power of colour depth
What is metadata
Meta data is the data about the file that is saved with it
Examples of metadata
File type
Date created
Author
Resolution
Color depth
What’s analogue sound
Sound waves that are pure and of perfect quality
Eg listening to a singer
What is amplitude
The height of the sound wave
What is a sample
The measure of amplitude at a point in time
What is sample rate
How many samples each second
The more samples per second. The more detailed the waves are and the better quality of the music
What is 1 hz
1 sample per second
What is 1000 samples per second
1 kHz
