A2 Peripheral Devices and Media Flashcards by Maks Hoppe

What is a keyboard ?

Panel of keys which inputs alphanumeric characters, symbols, simple commands into the computer

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What is a mouse ?

A pointing device which allows the user to control the cursor on screen to select objects & navigate graphical user interface

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What is a microphone and examples ?

Enters sound into computer - VoIP conversations, podcasts, vlogs

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What is a Webcam ?

Inputs video/still pictures into computers - VoIP

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What is a game controller ?

joystick with force-feedback feature

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What is a sensor ?

Takes readings from the environment. E.G - thermostat turns heating on / off

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What readings does a sensor take?

light / temperature

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What is a scanner ?

Converts documents into digital data which can be viewed and edited on computer, used for drawing online.

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What is a graphics tablet ?

Flat board and pointing device ( stylus ) - enters data like pen & paper

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Examples of input devices ( 7 points )

Keyboard
Mouse
Microphone
Webcam
Game Controller
Sensor
Scanner
Graphics Tablet

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What is a monitor ?

Outputs a visual display of user interface of software to see the data we are working with and effects of inputs

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What is a projector ?

Alternate to monitor for outputting visual display onto wall / screen E.G. film / presentation

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What is a printer ?

Produces physical copies of documents and images produced on a computer

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What is a plotter ?

Prints vector graphic images _ bigger quality on large paper
Used in computer aided engineering to print CAD designs

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What is a speaker ?

Audio output which converts digital audio signals from computer to analogue signals

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What is a Actuator ?

It produces a motion which controls / moves things which are used in sensors

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Examples of output devices ( 6 points )

Monitor
Projector
Printer
Plotter
Speakers
Actuator

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What type of storage are hard disk drives?

magnetic storage

How do hard disk drives work?

A HDD works by magnetising and demagnetising billions of tiny individual areas on platter.

Advantages of hard disk drives ( 2 points )

High storage capacity
Cheap with 1000gb costing as low as £50

Disadvantages of hard disk drives( 3 points )

Slow read and write speeds
A lot of moving parts which can easily damage the device making it risky as a portable device
Not portable - heavier

What type of storage are solid state drives?

Flash memory storage

Advantages of solid state drives ( 3 points )

Faster read and write speeds resulting in a faster time to turn on computer, load programs and save files
Consumes less power than HDDs
No moving parts meaning lower risk of getting damages

Disadvantages of solid state drives ( 3 points )

Very expensive with 1TB costing over £200
Lower storage capacity than HDDs
They have a finite number of writes before they no longer work

What type of storage are *USB flash drives*?

Flash storage

**Advantages** of USB flash drives? ( 4 points )

- Very portable ( light weight ) - Easy connectivity - No more parts - durable - Highly compatible with devices

**Disadvantages** of USB flash drives ( 3 points )

- Easy to lose due to being small - Finite number of writes - Low storage capacity and quite pricey for high storage

What type of storage are *SD cards*?

Flash memory

**Advantages** of SD cards ( 2 points )

- Small and portable meaning easy to transfer data - Reliable storage device as they cant be damaged as easily

**Disadvantages** of SD cards ( 2 points )

- Low storage -Lot of variety of SD cards meaning there is problems with compatibility

**Advantages** of optical devices ( 2 points )

- Majority of computers have optical disk drives to read disks - Very portable ( for distribution )

**Disadvantages** of SD cards ( 3 points )

- Low storage capacity - Easy to damage ( flimsy, easy to scratch ) - Finite number of writes

**Disadvantages** of using manual data processing ( 2 points )

- Human error ( prone to making mistakes such as typos resulting in un-correct results. ) - Time consuming ( More time needed due to manually entering data )

**Advantages** of using manual data processing ( 2 points )

- Complex data ( automated methods may not exist due to the complex data and manual data entry can handle any data type ) - Reduced training ( staff will be familiar with manual data entry )

**Disadvantages** of using automated data processing ( 2 points )

- Inflexible ( only very specific data ranges can be inputted ) - Learning curve ( Training is required to enter data )

**Advantages** of using automated data processing ( 2 points )

- Higher accuracy ( Not true if OCR is involved which is affected by poor handwriting ) - Time and cost - Its quicker and cheaper than hiring data entry staff

What are accessibility devices?

Alternative input and output devices for those with physical disabilities ( Accessibility devices / adaptive technology / assistive technology )

What is a *trackball* ?

A mouse with a ball within a holder that can be rotated to move the cursor ( for limited mobility )

What is a *braille and large keyboard* ?

Keyboard which uses braille characters on each key and higher contrast colouring on keys ( for visually impaired )

What is a *Touchscreen* ?

Used to easier select items/resize ( for visually impaired

What is a *braille embosser* ?

Printer which outputs using braille cells ( for visually impaired )

What are *screen magnifiers* ?

Attaches to an existing monitor and magnifies display output ( for visually impaired

What are *eye types* ?

Using cameras mounted on a computer to track eye movement to enter data with an onscreen keyboard ( for mobility difficulties. )

Examples of **accessibility devices** ( 7 points )

- Trackballs - Braille keyboard - Large keyboard - Touchscreen - Braille embosser - Screen magnifier - Eye typer