Input/Output — Set 6

Correct Answer: A. Scanner

A scanner is the primary input device for digitizing physical documents. It passes a light source over the document to capture a high-resolution digital image. Scanned files are typically saved in formats like PDF or JPEG.

Correct Answer: B. Delete

The Delete key removes the character located immediately after the cursor. In contrast, the Backspace key deletes the character to the left. The Delete key is also commonly used to remove selected files or folders.

Correct Answer: B. Cursor

The cursor is a blinking symbol, usually a vertical line, that marks the current insertion point in a text field. Its position changes as the user types or moves it with arrow keys. The mouse equivalent is usually called a pointer.

Correct Answer: B. Thermal

Thermal printers use heat to produce images on special heat-sensitive paper. They are fast, quiet, and do not require ink or toner, making them ideal for retail receipts. The printed text can fade over time when exposed to heat or light.

Correct Answer: A. Touchscreen

A touchscreen allows the user to interact with the device by tapping or swiping directly on the display. It serves as both an input and output layer for the device. This interface has made technology more intuitive and portable.

Correct Answer: B. Function Keys

Function keys are used to perform specific tasks defined by the operating system or active software. For example, F1 is the universal key for 'Help' in most Windows applications. They provide quick shortcuts to common features.

Correct Answer: B. Printer

A printer is the standard output device for creating physical copies of images and documents. Photo-quality printers often use specialized ink and paper to achieve vibrant results. Most modern printers can connect wirelessly to computers and phones.

Correct Answer: B. Trackball

A trackball features a stationary ball that the user rotates to control the cursor position. It requires less arm movement than a standard mouse, which can reduce strain. Trackballs are frequently used in industrial control systems.

Correct Answer: A. Microphone

A microphone captures sound waves and converts them into digital signals for the computer to transmit. It is the primary input device for internet telephony and gaming. Most headsets combine a microphone with headphones for better communication.

Correct Answer: B. Hardware

Hardware includes all the mechanical, electrical, and electronic components of a computer system. Input and output devices are key categories of computer hardware. Without hardware, software cannot be executed.