SDD Flashcards
Why do computers use binary
Computers use binary to store things,work with decimals the computer has to convert them to binary
Why do computers use binary
Computers use binary to store things,work with decimals the computer has to convert them to binary
How do you convery Denary to binary
Devide the number by two and keep track of remainders then read from bottom two top
How to covert binary to denary
Write out all the values from left to right then add them all up
Range of values
Smallest number = 0 larget number = 255
Number of values
256
Adding binary
1+0=1
0+0=0
1+1=0 carry 1
Rectangle FC SD
Process
Parallelogram FC
Input/output
Diamond FC
Decision
Rectangle with lines FC SD
Pre defined function
Smooth rectangle FC
Terminal
Hexagon FC
Iniharison
Circle FC
On page connector
—–> FC
Flowlines
Hexagon SD
Decision
Smooth rectangle SD
Loop
Vector graphics
Stored as objects and attributes
Bit map graphics
Stored as pixels in binary
Resolution
The quality of th image is determined by the number of pixels used
Colours
Many different shades and stored in bits
24 bit colour is true colour
Storage requirements
Storage (bits) = area(inches2)x pixels in a square inches x bit depth (bits)
Textual data
A character is a symbol,number or letter on the keyboard
