1.3- input, output + storage

def input device and give example

hardware that allows the users to enter data into a computer system

e.g = microphone

def output device and give example

hardware that receives information from a computer and presents it to the user

e.g = monitor, speaker

def virtual storage

data stored on remote servers (via internet)

data is not physically on your device

How does VM work?

data sent over internet → stored in data centres

retrieved when needed

managed by provider (backup + security)

ADV of VM

scalable - increase storage easily as needs grow

Accessible - anywhere with internet

cost effective - no need for own hardware

backup / redundancy - reduces data loss

DIS of VM

needs internet

security risks - sensitive data concerns

ongoing cost - subscription fees

what are characteristics of RAM

volatile - data lost when power off

R + W - CPU can ready and modify data

fast access - much quicker than secondary storage

random, access - any location can access data directly

what are characteristics of ROM

non - volatile - keeps data when power is off

read only - cannot be easily modified

stores firmware - permanent instructions

BIOS - starts computer, checks hardware

def RAM

volatile memory that stores data currently in use by the CPU

def ROM

non - volatile memory that stores permanent instructions needed to start the computer

what are 4 things to consider for RAM Vs ROM

speed, purpose, modifiability (R/W), volatility