System Architecture

Question 1

The CPU

Answer 1

Central processing unit

Most important part of computing system

The CPU purpose is to process data and instructions by constantly repeating FDE cycle

Question 2

CPU components

Answer 2

CU
ALU
Registers (PC, MDR, MAR, Accumulator)
Cache memory

Question 3

Von Neumann Architecture

Answer 3

A computer with this architecture stores both program instructions and data in the same memory.

Question 4

PC

Answer 4

Program counter

Stores the address of the next instruction to be run

Question 5

MAR

Answer 5

Memory address register

Stores the address where data will be fetched from

Question 6

MDR

Answer 6

Memory data register

Stores the data that is fetched from memory

Question 7

Accumulator

Answer 7

Stores the result of ALU calculation

Question 8

ALU

Answer 8

Arithmetic Logic Unit, this is
where calculations and comparisons are
performed, results stored in the accumulator.

Question 9

CU

Answer 9

Control unit, executes instructions and controls the flow of data in the CPU.

Question 10

Cache

Answer 10

To store data that is frequently used

Data does not need to be fetched from RAM, speeds up access

Makes CPU more efficient.