1.1 systems architecture key words

Question 1

processor

Answer 1

a machine that processes data and it is the brains of the computer

Question 2

MHz

Answer 2

a unit of frequency equal to one million hertz per second

Question 3

GHz

Answer 3

a measure of frequency equal to one cycle per second

Question 4

hertz

Answer 4

the SI unit of frequency equal to one cycle per second

Question 5

instruction

Answer 5

a code in a program witch defines and carries out an operation

Question 6

execute

Answer 6

carry out an instruction or program

Question 7

embedded system

Answer 7

a computer within another device a calculator a dishwasher burglar alarm usually dedicated alarm

Question 8

clock speed

Answer 8

speed the processor carry’s out

Question 9

cache

Answer 9

very fast memory between the processor and the RAM main memory use instruction

Question 10

core

Answer 10

core is the part of the processor that execute instructions dual core means two core means that you cant do two diffrent instructions instructions quad core can do four

Question 11

von neumann architecture

Answer 11

The computer hard wear when program instructions and data are held in the same memory where as Harvard architecture has separate memory for the data and memory

Question 12

MAR

Answer 12

Memory address register holds an a dress of main memory that to be fetched or written to

Question 13

MDR

Answer 13

Memory data register holds data from memory or about to be written

Question 14

Program Counter

Answer 14

Holds address of the next instruction to be fetched

Question 15

Accumulator

Answer 15

Holds the result of a calculation and value that is being input

Question 16

ALU

Answer 16

Arithmetic and logic unit preform arithmetic like calculations and preforming logic (and or and not)

Question 17

CU

Answer 17

Holds the instruction just from memory and its been decoded an instruction is split into an op code (an operation to be preformed) and operand (the data preform on)

Question 18

busses

Answer 18

Address bus carry’s the address from the MAR to main memory data bus this carry’s data/instructions from main memory to MDR. control bus send a read or write signal depending ether it need to fetch something from memory