1.1 systems architecture

Question 1

cpu

Answer 1

central processing unit - main part of the computer consisting of the registers, ALU, and control unit and main memory.

Question 2

fetch decode execute cycle

Answer 2

retrieving and instruction from storage, decoding it and carrying it out

Question 3

alu

Answer 3

arithmetic logic unit - performs calculations and logical comparisons in the cpu

Question 4

cu

Answer 4

control unit - decodes instructions. sends clock signals to control how data moves around the cpu.

Question 5

accumulator

Answer 5

holds results of calculations

Question 6

cache

Answer 6

memory in the processor that provides fast access to frequently used instructions and data

Question 7

register

Answer 7

tiny areas of very fast memory in the cpu

Question 8

MAR

Answer 8

holds address of the data to be fetched from memory and holds the address of where the data will be saved

Question 9

MDR

Answer 9

holds data to be fetched from memory and holds the data to be saved

Question 10

clock speed

Answer 10

how many instructions can be executed per second by the CPU. 3.5ghz= 3.5 billion instructions per second.

Question 11

cache size

Answer 11

the larger the cache the more data which can be stored without having to go back to the RAM. more cache = slower processing

Question 12

cores

Answer 12

single component with two or more independent processors

Question 13

embedded system

Answer 13

system built into a machine. usually has one purpose only and built on a single circuit board.

Question 14

PC

Answer 14

holds the adress of the next line of the program and counts the programs

Question 15

what does having multiple cores do

Answer 15

more then one instruction can be processed at a time