Which device is primarily used to enter text and commands into a computer?
A) Dot-matrix printer B) Keyboard C) RFID reader D) Inkjet printer Answer: B Explanation: A keyboard is an input device […]
Input & Output Devices
Input & Output Devices
Input & Output Devices
Which pointing device controls the on-screen pointer through physical movement?
A) Touchscreen B) Mouse C) Speakers D) Webcam Answer: B Explanation: A mouse translates hand movement and button actions into […]
Input & Output Devices
Which input device converts paper documents or photographs into digital images?
A) Webcam B) Monitor C) Dot-matrix printer D) Scanner Answer: D Explanation: A scanner captures physical documents and converts them […]
Input & Output Devices
Which device captures live video as input to a computer?
A) Stylus B) Webcam C) RFID reader D) OMR scanner Answer: B Explanation: A webcam is a digital camera used […]
Input & Output Devices
Which device captures sound and converts it into an electrical or digital signal?
A) Microphone B) Fingerprint scanner C) Joystick D) Headphones Answer: A Explanation: A microphone is an input device for voice […]
Input & Output Devices
Which device reads printed barcodes?
A) Barcode reader B) Scanner C) Printer D) Headphones Answer: A Explanation: A barcode reader scans coded patterns and sends […]
Input & Output Devices
Which input device reads characters printed with magnetic ink on bank cheques?
A) Webcam B) MICR reader C) Printer D) Touchscreen Answer: B Explanation: MICR technology recognizes magnetically printed characters, especially on […]
Input & Output Devices
Which device is commonly used to read shaded marks on objective-test answer sheets?
A) Inkjet printer B) Projector C) OMR scanner D) Plotter Answer: C Explanation: Optical Mark Recognition detects filled bubbles or […]
Input & Output Devices
Which technology converts images of printed text into editable machine-readable text?
A) Projector B) Monitor C) Headphones D) OCR Answer: D Explanation: Optical Character Recognition identifies characters in scanned documents or […]
Input & Output Devices
Which input device is commonly used to draw directly on a graphics tablet?
A) Stylus B) Headphones C) Scanner D) Barcode reader Answer: A Explanation: A stylus provides pen-like input on tablets and […]