Test 1 Study Guide Flashcards
Pass the bloody test.
Boolean Operation: AND
Both inputs need to be true to be true (1+1=1, 1+0=0, 0+1=0, 0+0=0)
Boolean Operation: OR
Any input is be true to be true (1+1=1, 1+0=1, 0+1=1, 0+0=0)
Boolean Operation: XOR
ONLY 1 input is true to be true (1+1=0, 1+0=1, 0+1=1, 0+0=0)
Boolean Operation: NOT
Opposite of the input (1=0, 0=1)
Boolean Operation: NAND
Perform AND, NOT the output (1+1 = 1 = 0, 1+0 = 0 = 1, 0+1 = 0 = 1, 0+0 = 0 = 1)
Boolean Operation: NOR
Perform OR, NOT the output (1+1 = 1 = 0, 1+0 = 1 = 0, 0+1 = 1 = 0, 0+0 = 0 = 1)
Two’s Complement
Store negative numbers in binary.
NOT all bits, add 1
10000001 = 01111110 + 1 = 01111111
Hex Numbers
Base 16 number system.
Always starts with “0x”
0 => F
0 => 15
Example: 0xEE = 14 + 14*16 = 238
To Binary: 238 in binary = 11101110
Bit
Single binary piece of data 1 or 0
Boolean Operation
A logic operation to taking two inputs and giving a single signal output
AND, OR, XOR, NOR, NAND
Address
A location in memory.
Typically represented in hex.
Track
On a hard drive, a continuous line of data stored on the disk
Sector
The piewedge!
A single section of data on a track
Cylinder
On a hard drive.
The set of all tracks that have the same size in a set of platters
Imagine using a smaller cookie cutter on a stack o pancakes, the line that it makes through all pancakes is the cylinder.
Seek Time
The average amount of time it takes for a hard drive to move to a place on the disk
Latency Time
The total amount of time it takes for a disk read to occur
Transfer Rate
The speed at which data is transmitted from a hard drive
ASCII
The old way of encoding characters in binary or hex. Just English is available.
Pixel
A single dot of visual data on a screen
