4 Hardware Flashcards
1
Q
Semiconductor
A
Material whose electrical properties are intermediate between a good conductor of electricity and nonconductor of electricity
2
Q
Megabyte Giga Tera Peta Exa
A
1 million bytes 1 billion bytes 1 trillion bytes 1 quadrillion bytes 1 quintillion bytes
3
Q
Ascii
A
Binary code most widely used on cmoputers in Eng and WEuro langs
4
Q
Unicode
A
2 bytes for every character, rather than 1
5
Q
Multicore processor
A
Divides work over more than one processor
6
Q
CPU
A
Control unit
Logic unit
7
Q
Machine cycle
CPU:
A
Fetches instruction
Decodes
Executes
Stores it
8
Q
DRAM
A
Must be constantly refreshed by CPU or will lose its contents
9
Q
SDRAM
A
Synchronous dynamic RAM
10
Q
DDR-SDRAM
A
Double-data synchronous dynamic RAM
DDR2 and DDR3
11
Q
RDRAM
A
Rambus DRAM, faster than SDRAM
12
Q
SRAM
A
Static RAM
Doesn’t need refresh
13
Q
MRAM
A
Newer Nagnetoresistive RAM Uses magnetic charge Faster Stores more data than RAM Retains contents when power off
14
Q
Cache
A
Level 1: part of the microprocessor chip 8 to 128 kb Faster than level 2 Level 2: not part of processor chip External cache 64kb to 16 mb Most commonly cited Level 3: on motherboard 2-8 mb
15
Q
VRAM
A
Hard disk
Extends RAM
