Input/Output — Set 4
Computers · इनपुट/आउटपुट · Questions 31–40 of 70
What is the 'GEMS' term for the part of a computer that displays the results of processing?
Correct Answer: A. Output Device
Output devices take processed data from the computer and present it in a form that humans can understand. Examples include monitors, printers, and speakers. They are the final stage in the information processing cycle.
The 'GEMS' standard layout for most computer keyboards is known as?
Correct Answer: C. QWERTY
QWERTY is named after the first six letters on the top row of the keyboard. This layout was originally designed for early typewriters to prevent mechanical jams. It is now the most widely used keyboard arrangement in the world.
Which 'GEMS' input device is used to detect marks on a pre-printed form, such as an MCQ answer sheet?
Correct Answer: D. OMR
Optical Mark Recognition (OMR) detects the presence of pen or pencil marks in specific areas of a paper. It is the standard technology used for processing competitive examination answer sheets. It allows for the rapid and accurate grading of thousands of papers.
The 'GEMS' measurement for the clarity and sharpness of a printed image is?
Correct Answer: A. DPI
DPI stands for Dots Per Inch, which describes the density of ink droplets on a page. A higher DPI value indicates a higher resolution and better print quality. Most professional photo prints require at least 300 DPI.
Which 'GEMS' input device is primarily used on a laptop to move the cursor?
Correct Answer: C. Touchpad
A touchpad is a flat, pressure-sensitive surface that tracks the movement of a user's finger. It acts as a built-in replacement for a mouse on portable computers. Many touchpads now support multi-finger gestures like scrolling and zooming.
What 'GEMS' device is used to convert digital computer signals into physical sound?
Correct Answer: D. Speakers
Speakers receive electrical signals and use a diaphragm to create sound waves in the air. This allows users to listen to music, system alerts, and voice prompts. They are essential for a complete multimedia experience.
In 'GEMS' computer terminology, a 'Hard Copy' is produced by which device?
Correct Answer: A. Printer
A hard copy is a physical, permanent version of digital information printed on paper. Printers use ink or toner to create this tangible record. Hard copies are useful for documentation when electronic devices are not available.
Which 'GEMS' input device is often used in video calling to capture the user's face?
Correct Answer: C. Webcam
A webcam captures live images and transmits them to a computer for storage or real-time viewing. It is the standard tool for remote communication and video recording. Most modern laptops include an integrated webcam above the screen.
The 'GEMS' key used to create a new line in a word processing document is?
Correct Answer: D. Enter
The Enter key, also known as the Return key, signals the computer that a command is complete or a new paragraph should start. It is one of the most frequently used keys on the keyboard. In forms, it is often used to submit data.
Which 'GEMS' technology is used by a barcode reader to scan codes?
Correct Answer: A. Light source and sensor
A barcode reader uses a laser or LED light to illuminate the barcode and a sensor to measure the reflected light. The differences in reflection between black and white bars are converted into digital data. This technology is a staple in modern inventory management.