1.1.3 Input, output and storage

What is an input device (1)

• used to put data and instructions into a computer

what is an output device (1)

• used to send information from the computer

3 examples of input devices (3)

• keyboard

• mouse

• webcam

3 examples of output devices (3)

• printer

• speaker

• projectors

examples of an input and output device (1)

touchscreen

3 types of storage (3)

• magnetic

• optical

• flash

how do magnetic storage devices work (1)

• stroes data by magnetising particles on a disk/tape

advantages of magnetic stoarge devies (2)

• high storage capacity

• relatively low cost per gigabyte

disadvantage of magnetic storage devices (2)

• susceptible to physical damage

• slower read/write speeds

how do optical storage davices work (1)

• stores data by using laser to burn pits into the surface of the disk

advantages of optical storage devices (3)

• suitable for distributing software

• easy transport

• durable

disadvantages of optical stoarge devices (2)

• lower storage capacity

• can easily be damaged

how do flash storage devices work (1)

• stores data in flash memory cells

advantages of flash storage devices (2)

• fast read/write speeds

• no moving parts so less likely to fail due to phjysical shock

disadvantages of flash storage devices (2)

• higher cost per gigabyte

• flash memory cells can wear out after a certain number of write cycles

example of magnetic storage devices (1)

• HDD

example of optical storage devices (2)

• CD

• DVD

example of flash memory device (2)

• SSD

• USB

What type of storage are RAM and ROM (1)

primary storage

What does RAM store (2)

• stores data that is currently being used by the computer, such as open applications and files

• which speeds up the computers execution

Is RAM volatile or non-volatile (1)

volatile - meaning its contents is lost when computer is turned off

What affect does more RAM have (2)

• more data can process simultaneously

• leading to faster performance

What does ROM store (2)

• stores the BIOS or firmware that is used to start up the computer and initialise the hardware components

• This data is essential for the computer to function and needs to be preserved even when the computer is turned of

Is ROM volatile or non-volatile

• non-volatile - meaning it retains its contents even when the computer is turned off

What is virtual storage (4)

• also known as cloud storage

• secondary storage

• stores data remotely accross multiple servers

• so it can be accessed by any computer that has access to the same system

2 examples of virtual cloud storage (2)

• google drive

• mircosoft one drive

why do we need virtual storage (3)

• amount of data generated and being used is growing

• Storing all this data on local devices can be impractical due to limitations in storage capacity and the risk of data loss

• offering scalable, off-site storage with built-in redundancy and backup

how doers virtual storage work (3)

• data is transmitted over the internet to a data center

• this center uses servers to store your data which can be accessed on demand

• the servers are maintained by cloud storage provider who ensures data is secure and backed up

advantages of virtual storage (4)

• easily scalable

• data can be accessed from anywhere with internet

• data is less likely to be lost

• cost effective only pay for what u use

disadvantages of virtual storage (3)

• dependent on internet connection

• security concerns , storing sensitive data off-site can pose as a risk

• ongoing costs - an ongoing expoense which can add up over time

What does BIOS stand for (1)

Basic input output system