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.