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WorksheetsCambridge - IGCSE - Computer Science - Input Devices
Total questions: 66
Worksheet time: 38mins
What is an input device?
A piece of software that allow a user to interact with a computer system.
A piece of hardware that outputs information from a computer system.
A piece of hardware that allows a user to interact with a computer system.
A piece of software that outputs information from a computer system.
What is hardware?
The Desk, the chair and the window by which you sit.
The programs within a computer
The users of a computer system
The physical components of a computer
What is a keyboard?
A piece of peripheral hardware, probably the most common way of entering data into a computer.
An amazing way of making music.
A device specifically designed for playing games.
An alternative to the guitar for learning musical theory.
Can keyboards be considered software?
NO...keyboards are a peripheral device designed to connect to a computer system.
YES..On screen keyboards are common on smartphones, tvs etc.
YES..sometimes there is a soft rubber cover to the keyboard.
NO..keyboards are a hardware device only.
What are the advantages of a keyboard?
Keyboards are simple to use, customisable, and if the user is experienced, a very fast way of inputting data.
Keyboards are multi function and can be used to output data too.
It is easy to make a mistake when using a computer to input data.
If a person is not trained, it is a very slow method of data input.
What is a concept keyboard?
Used in music production to produce far out sounds.
A regular computer peripheral, used to input data.
A software keyboard found on smart phones.
A concept keyboard is generally a flat surface that has a grid of buttons on it.
Where would a concept keyboard be used?
In a restaurant where limited options may be required and choices can be restricted.
To enter music directly into midi.
To enter data into a computer in an unrestricted way.
To control the events of a software application.
Identify the component.
A concept keyboard
A portal to a parallel universe.
A standard keyboard peripheral input device.
A software keyboard
Identify the type of keyboard.
A standard peripheral hardware keyboard.
A concept keyboard.
A ZX81 old school input device.
An on-screen software keyboard
Identify the type of keyboard.
A standard hardware peripheral keyboard.
A flashback to childhood
A concept keyboard.
An on-screen software keyboard.
Identify the input device described. A device used to control a pointer or cursor on screen, interacting with a Graphic User Interface using buttons.
Scanner
Camera
Speaker
Mouse
Identify the advantages of using a mouse to interact with your computer system.
Simple to use and allows efficient navigation around a screen.
Written content can be easily added.
A user needs a flat surface to operate the device.
If a rollerball type, the ball can become clogged with dirt and become inefficient.
Identify the component.
Television
Optical Pen Drive
Scanner
Mouse
Identify the peripheral
A mouse
A trackball
A scanner
A thumb exerciser
What peripheral is being described? a piece of equipment used to digitally recreate a document by shining light onto the surface of the document and recording the reflection.
A digital camera
A Mouse
A Printer
A Scanner
Identify the peripheral device
A hand held scanner
A 3d scanner
A photograph viewer
A flat bed scanner
Identify the peripheral device
A hand held scanner
A 3d scanner
A photograph viewer
A flat bed scanner
What does OCR stand for?
Optical Character Recognition
Optional Chord Recording
Organised Chaos Reality
Optical Costume Rewards
What does OMR stand for?
Orthopedic Master Record
Orchestral Manoeuvres Respite
Optical Mark Recognition
Off Mode Record
What is Optical Mark Recognition?
The process of scanning a document
Noughts and crosses
A process for making music through midi
A process where scanned marks on a page are automatically converted to inputs.
What does Optical Character Recognition do?
Recognises faces in digital surveillance cameras
Spots Mario
Places spectacles on faces
it is a process through which a document is recognised and converted to digital text.
What are the advantages of a scanner?
Flatbed scanners are able to produce digital copies of documents that are quite high in quality.
Digital copies created by a 2D scanner can be edited with software such as graphics creators, photograph editors and word processors.
A digital copy of a scanned document can be added to an email or included in another digital document.
There are no advantages of a scanner.
What are the disadvantages of a scanner?
There are no disadvantages
Scanned documents can use a lot of memory, especially if they are high resolution.
Scanned copies are not likely to as high quality as the original
If the original is bad quality, the scanned copy will probably be worse.
How does a 3D scanner work?
Through pulsar light reactors.
Using a laser ot light source (sometimes x rays), measurements are taken of the geometry of an object and stored digitally in a computer system.
By reflection through mirrors.
Through light sensors and computer aided drawing
Where are you most likely to find a 3D scanner?
In the kitchen
Security scanner at an airport
In a car
Smart television
What are biometrics?
Measurements in biology
A humans features
Mechanical exercises
Car fuel additives.
How are biometrics used in security?
Measurements are taken of regular human features.
They are not used for security.
To store a person's name and address
A person's features are scanned and stored digitally for the purpose of recognition. When assessing a credible match, features are scanned again and compared to the original stored data.
What is a biometric device?
A new form of nuclear reactor
A clock
A device that recognises human physical characteristics, such as fingerprints.
A GPS alternative
Identify features that are suitable for biometric recognition.
Faces
Fingerprints
Retinas
Toe nails
What is a barcode?
An identifier for Gold Ingots.
Black vertical bars with spaces (with white vertical bars between) that translate into numbers when scanned with a barcode reader.
A system for validating data entry.
Am alternative to website communication.
In a supermarket, how is a barcode used?
To decorate all the items accordingly.
They have no credible use.
Only used in large shops.
The barcode is matched with an item of stock in the shop database. When scanned, the computer system accesses all the information required to create a transaction.
What are the advantages of using a barcode?
A barcode can be used to help keep a record of stock levels for a product.
If the barcode is damaged, not printed clearly, or rubbed away in part, it may not scan properly.
A very efficient method of entering a product's details to find out its price.
If the barcode has not been recorded in the computer system, the barcode scanner will not be able to find it.
What are the dis-advantages of using a barcode?
A barcode can be used to help keep a record of stock levels for a product.
If the barcode is damaged, not printed clearly, or rubbed away in part, it may not scan properly.
A very efficient method of entering a product's details to find out its price.
If the barcode has not been recorded in the computer system, the barcode scanner will not be able to find it.
Identify the above image.
Pictionary score card
QR Code
Barcode
Cross Word Puzzle
What are QR Codes used for?
Storing text messages, identifying website URLS, linking social media profiles or storing data to name a few.
Crossword puzzles.
Stock recognition
Suduko
How do you make a QR Code?
Printing from your personal camera
By visiting a QR website generator and choosing the information that you would like to communicate.
Purchasing a package from a stationary store
From the local solicitors
What are the advantages of a QR code?
QR Codes are a very efficient method of storing information and linking to it
QR codes are not yet as common as barcodes. There may be some people that do not know what they are used for.
QR Codes can store a variety of information including links to websites, images, videos and messages
Without the devices to read them, people do not have the ability to interact with them.
Even of some areas of a QR code are missing or covered up, the code can often still be read.
What are the dis-advantages of a QR code?
QR Codes are a very efficient method of storing information and linking to it
QR codes are not yet as common as barcodes. There may be some people that do not know what they are used for.
QR Codes can store a variety of information including links to websites, images, videos and messages
Without the devices to read them, people do not have the ability to interact with them.
Even of some areas of a QR code are missing or covered up, the code can often still be read.
What is encoding?
Encrypting data
Creating a cypher by which information can be read.
A private key.
The process of converting data or information to a particular form.
Identify the input device.
Digital Camera
Light Pen
Digital Flash Drive
Flatbed Scanner
In a digital camera - what does the CCD (Charge-Coupled Device) do.
It stores the pictures for later retrieval
It is a device for taking the picture remotely
Sets the light aperture on the camera
It is the sensor that records the light projected upon it.
What attribute of the CCD (Charge-Coupled Device) effects the picture quality in a digital camera?
The number of available 'pixels' on the sensor.
The amount of time it takes to record an image.
The cost of the unit.
The brand of the sensor
Identify advantages of a digital camera over a film camera.
An image taken with a digital camera can be immediately seen on screen. Therefore the user can decide if they want to take another image instantly if they think that one is not good enough.
A backup copy can be made of any digital images taken. If the original copy of the images are lost, the user still has a backup.
Images taken with a digital camera can be shared as they are an electronic copy. they can easily be attached to emails or uploaded to social networking sites.
An image taken with a digital camera can be easily edited as it is an electronic file.
Identify the disadvantages associated with a digital camera.
if a digital camera has only a very small number of pixels, the quality of image recorded will be lower than that of a fil camera
Images may be accidentally shared to the web if settings are not in place to prevent it.
If a user has a lot of images, vast amounts of storage is required digitally.
There are no disadvantages
What does LCD stand for when describing a touch screen?
Liquid Crystal Diodes
Latency Crypto Density
Liquid Crystal Display
Large Capacity Display
identify features of a touch screen
Can be operated by fingers or a stylus
Has a virtual keyboard
Utilise GUIs
More advanced touch screens can respond to gestures such as swipes, pivots and combined finger inputs
Identify the two main technologies of touch screens manufacturing.
Glow in the dark
Capacitive
Self reading
Resistive
How does a capacitive touch screen recognise input from a human being?
It predicts movement
It detects the natural electronic signals that we have in our bodies when the screen is interacted with.
They use facial recognition.
It has many layers built into the screen that respond to applied pressure to detect interaction.
How does a resistive touch screen recognise input from a human being?
It predicts movement
It detects the natural electronic signals that we have in our bodies when the screen is interacted with.
They use facial recognition.
It has many layers built into the screen that respond to applied pressure to detect interaction.
Why do capacitive touch screens not work when you are wearing gloves?
You may become clumsy and drop the phone
Gloves are good insulators and therefore do not conduct the electrical signals required from the fingers to operate the touch screen.
It may be too cold for the touch screen to work
They are not an appropriate fashion option.
Where are touch screens considered to be the most suitable for input?
Home TVs
Cooking appliances.
Small devices such as smartphones, tablets, e-readers, PDAs and SAT NAV systems because they illuminate the need for a physical keyboard.
Kiosks, Shopping terminals and interactive tables where a keyboard and mouse would not be a suitable input system.
Identify some perceived advantages of touch screens.
Touch screens can be quite imprecise, making it difficult to touch the required position accurately, particularly if badly calibrated.
Inputs might not be possible if the screen is damaged.
Touch screens are very simple to use.
Touch screens save space as they combine input and output on one device.
Identify some perceived dis-advantages of touch screens.
Touch screens can be quite imprecise, making it difficult to touch the required position accurately, particularly if badly calibrated.
Inputs might not be possible if the screen is damaged.
Touch screens are very simple to use.
Touch screens save space as they combine input and output on one device.
Identify the device.
Black board
TV
Mouse
Interactive whiteboard
Identify the device: input only, connected to a computer, display projected onto the device, sensors pick up the position if interaction.
TV
Interactive whiteboard
Touch Screen
Mouse
Identify some elements of software that runs on interactive whiteboards
Handwriting recognition
PC control
Text input via virtual keyboard
Pins to hold details
Identify situations where interactive whiteboards may be useful.
High definition gaming
Education, at schools, colleges and universities
Sport: strategy planning and presentations
Business: Meeting, discussions and presentations
Identify perceived advantages of an interactive whiteboard
Quite versatile - can be written on, drawn on, display images and text.
Offer a large screen that is excellent for use in the classroom or business environment.
Must be accurately calibrated before use otherwise a user may touch the board in one place and the ouch is not registered
Can be quite imprecise, which can make it difficult to carry out detailed operations.
Identify perceived dis-advantages of an interactive whiteboard
Quite versatile - can be written on, drawn on, display images and text.
Offer a large screen that is excellent for use in the classroom or business environment.
Must be accurately calibrated before use otherwise a user may touch the board in one place and the ouch is not registered
Can be quite imprecise, which can make it difficult to carry out detailed operations.
Identify the peripheral input device.
Touch Screen
Mouse
Microphone
Monitor
What does ADC stand for?
Digital to Analogue Converter
A Dainty Conversation
Analogue to Digital Converter
Accept Deny Control
What is the function of a microphone?
An analogue input device that captures sounds.
A digital communication device
An analogue output device that amplifies sound
A small smart phone
In video conferencing, what device is used to capture sound?
A speaker
A Microphone
A Monitor
An interactive smart board
Identify where a microphone could be used for voice recognition.
In-game-speech allowing players to communicate with each other
When calling a friend
Speech -to-text software allowing spoken words to be converted to text.
Speech control - allowing the user to control hardware
Identify perceived advantages of using a microphone.
The software may not recognise accents and therefore the translation is not accurate.
Allow the use of speech recognition systems.
Disabled users with hand and finger impairment can use a microphone to input commands to a computer
Sound might not be accurately recorded
Speech recognition systems have to be trained before they can be used properly.
Identify perceived dis-advantages of using a microphone.
The software may not recognise accents and therefore the translation is not accurate.
Allow the use of speech recognition systems.
Disabled users with hand and finger impairment can use a microphone to input commands to a computer
Sound might not be accurately recorded
Speech recognition systems have to be trained before they can be used properly.
