Unit 2 Flashcards
Q.1 What is an input device?
A.1 Hardware device that sends data to a computer.
Q.2 What is a keyboard?
A.2 Input device used to enter fixed values and characters into the computer.
Q.3 What is a numeric keypad?
A.3 Keyboard with 0 to 9 digits.
Q.4 What is a mouse?
A.4 Hand-held device used with a computer to move the cursor on the screen.
Q.5 What is an optical mouse?
A.5 Emits light and uses optical sensor to detect changes in reflected lights.
Q.6 What is a wireless mouse?
A.6 Mouse not connected to computer by cable but connects to it with radio waves.
Q.7 What is a touchpad?
A.7 Device that allows a person to move cursor on screen with the help of the finger.
Q.8 What is a tracker ball?
A.8 Device to move pointer with the method of moving the ball.
Q.9 What is a remote control?
A.9 Small, handheld devices used to control other devices.
Q.10 What is a joystick?
A.10 Can carry out same tasks as a mouse and control movement.
Q.11 What is a driving wheel?
A.11 Used as input device to simulate driving in driving games.
Q.12 What is a touch screen?
A.12 Display that can be used as both as input and output device.
Q.13 What are magnetic stripe readers?
A.13 Devices used to read a magnetic stripe of a card with data.
Q.14 What is a chip and PIN reader?
A.14 Device used to read data stored in the chip of a credit or debit card.
Q.15 What is RFID (radio frequency identification)?
A.15 Uses radio waves to identify and track special tags attached to objects.
Q.16 What is an RFID tag?
A.16 A tag that uses radio frequency to store and transmit data.
Q.17 What is a unique identifier?
A.17 Characteristic of element found only in a particular item.
Q.18 What is OCR?
A.18 A system that scans a typewritten or printed document and translates it to the computer as data.
Q.19 What is OMR?
A.19 Data marked by humans can be selected and captured then processed by a computer.
Q.20 What is a bar code?
A.20 Set of short parallel lines that transmit data after being scanned.
Q.21 What is a QR scanner?
A.21 Quick scanner application that can be used to scan QR tags and load data.
Q.22 What is a QR code?
A.22 Code stored in a square with different shapes that contain data, URLs, and links.
Q.23 What is an output device?
A.23 Device used to send data from computer to another device.
Q.24 What is a monitor?
A.24 Device that displays the data that is output by a computer or another device.
Q.25 What is a multimedia projector?
A.25 Device that projects images from a computer onto a large surface.
Q.26 What is a resistive touch screen?
A.26 Screen sensitive to pressure from finger.
Q.27 What is a capacitive touch screen?
A.27 Touch screen sensitive to static electricity from the finger.
Q.28 What is a scanner?
A.28 Device that digitizes text, diagrams, and images.
Q.29 What is a hard-copy?
A.29 Document printed on paper.
Q.30 What is a digital camera?
A.30 Produces digital images that can be stored in a computer and displayed on a screen.
Q.31 What is a memory card?
A.31 Type of storage device used for storing data.
Q.32 What is a pixel?
A.32 Individual point of light in a digital image.
Q.33 What is a video camera?
A.33 Camera used to make record of moving pictures.
Q.34 What is a webcam?
A.34 Special category of video camera that has no capacity connected directly to the computer.
Q.35 What is a video-conference?
A.35 Meeting held by people who are talking to each other over the internet.
Q.36 What is a microphone?
A.36 Device that converts sound to analogue electrical signal and input audio.
Q.37 What is a sensor?
A.37 Device that detects and responds to some sort of input from the environment.
Q.38 What is a temperature sensor?
A.38 A device that reads temperature and sends readings to the processor.
Q.39 What is a smartphone sensor?
A.39 Sensor in smartphone to measure movement, rotation, pressure and sensitivity.
Q.40 What is a pressure sensor?
A.40 Device that measure pressure and sends data to processor.
Q.41 What is a light sensor?
A.41 Device that measures light levels and sends it to a processor.
Q.42 What is a light pen?
A.42 Specialized pen that works with CRT monitor.
Q.43 What is a CRT monitor?
A.43 Monitor with cathode ray tube.
Q.44 What is a graphical tablet?
A.44 Input device with a flat pad which the user draws on or points at with a special pen.
Q.45 What is a stylus?
A.45 Pen-shaped instrument that is detected by a touch screen or tablet.
Q.46 What are printers and plotters?
A.46 Devices that produce output onto another material.
Q.47 What is a laser printer?
A.47 Printer that works by using laser to draw required output.
Q.48 What is an inkjet printer?
A.48 Printer that works by squirting ink out of different nozzles to create output on a piece of paper.