1.1.1

Question 1

CPU

Answer 1

processes data and is where all the sorting, searching, calculating and decision making takes place

Question 2

two components of the CPU

Answer 2

arithmetic logic unit (carries out calculations) and control unit (responsible for decoding instructions)

Question 3

cache

Answer 3

high speed memory located located close to the CPU and stores frequently used data

Question 4

registers

Answer 4

memory locations within the CPU and can be accessed very quickly, they are nothing but storage

Question 5

types of von neumann architecture

Answer 5

-accumulator
-memory address register
-memory data register
-program counter

Question 6

accumulator

Answer 6

stores results of calculations made by ALU

Question 7

instruction register

Answer 7

stores most recently fetched instruction while it is waiting to be decoded and executed

Question 8

memory address register

Answer 8

stores the location of where the data needs to be fetched and used by the MDR

Question 9

memory data register

Answer 9

stores data of the address location which is in MAR

Question 10

program counter

Answer 10

holds the address of the next instruction to be executed

Question 11

what is von neumann architecture?

Answer 11

he created the ‘‘stored program”, the CPU can changes task simply by loading a different program into memory- no rewiring needed

Question 12

fetch-decode-execute cycle

Answer 12

1. program instructions are copied from storage to RAM
2. program counter holds address for next instructions to fetch
3. value in program counter is copied to MAR
4. control unit locates and fetches data
5. if it’s instruction it’s placed in the IR
6. program counter is incremented by one
7. instruction in IR is decoded by control unit
8. instruction is executed by placing a request for data into MAR for data to be collected and copied to MDR
9. if it’s data it’s placed in MDR