Section 4 system and components

Question 1

input device

Answer 1

Keyboard, Mouse, Scanner , Microphone and web cam

Question 2

CPU

Answer 2

Central Processing Unit

Continuously read and execute instructions stored in memory by repeatedly carrying out the fetch-execute cycle

Contains: Arithmetic logic unit and control unit
to several general purpose and special purpose registers

Question 3

Output device

Answer 3

Monitor, printer and speaker

Question 4

Explain the fetch- decode- execute CPU cycle

Answer 4

Fetch: CPU fetches instructions from the main memory
decode: Control unit decides what to do with it
execute: The instruction is then run or executed

Every cycle is regulated by CPU clock

Question 5

Arithmetic Logic Unit

Answer 5

Does the mathematical equations and operations also does the logic operations.
Compares values held in registers

Question 6

Control Unit

Answer 6

Coordinates CPU actions in the cycle and receive signals and decode instructions

Question 7

Clock

Answer 7

Regulates speed and timing of all computer functions and signals

Question 8

Registers

Answer 8

Smaller/faster than cache memory, registers are built into the CPU to temporarily store memory addresses, instructions

Question 9

Bus

Answer 9

A collection wires used to transfer data and instructions from one component to another

Question 10

Cache(MEMORY)

Answer 10

More expensive
Small/fast memory that can transfer data
to the CPU faster than RAM holds recently used block of data or program instructions that are likely to be needed again.

Have different levels such as level 1 being smallest and fastest

Question 11

Register

Answer 11

special-purpose memory locations located within the CPU, used in the execution of instructions. Even smaller and faster than cache

Question 12

Volatile Memory

Answer 12

is when all contents is lost when power is turned off

Question 13

John Von Neumann

Answer 13

developed the stored program computer the von neumann architecture involves storing both programs and the data they use in memory

Question 14

Clock Speed

Answer 14

determines the number fetch-execute cycles happen per second. Every cylce is a tick on the clock.

Question 15

Cache Size

Answer 15

Operates faster than the main memory, data is transferred in and out of cache memory more quickly
making it more efficient
has 3 levels-1 being the smallest but fastest

Question 16

Number of cores

Answer 16

Processor may contain more than 1 core each cores processors are one operation per clock cycle.
more cores more it can run
however it cant run simultaneously depending on if the software is designed that way