Computer Science

Dot Matrix Printers are a type of impact printer because they print by striking an ink-soaked ribbon against the paper, similar to a typewriter mechanism.

A printer requires installation to function properly, which includes installing drivers and software so the computer can communicate with the printer. While ink, paper, and network access may be necessary depending on the printer type, installation is a fundamental requirement for operation.

A joystick is an input device because it allows the user to provide directional control signals to a computer or gaming system. It does not output data, store data, or process data itself.

An optical mouse uses laser or LED light to detect movement by tracking the surface beneath it, unlike mechanical or opto-mechanical mice which rely on a physical ball and sensors.

A scanner is a light-sensitive device that converts drawings, printed text, or other images into digital form by capturing the image and converting it into a digital signal. Keyboards and OMRs do not perform this function.

A scanner is an input device because it captures images or text and sends the data to the computer. Printer, monitor, and speaker are output devices as they display or produce information from the computer.

When a song is played through a speaker, the output produced is sound waves, which are physical vibrations in the air. This type of output is considered a 'hard' or physical output because it involves a tangible, physical phenomenon (sound waves) that can be perceived by human ears. 'Soft output' typically refers to outputs displayed on screens or monitors, which are visual and intangible. Therefore, the correct answer is 'Hard Output'.

USB (Universal Serial Bus) is a widely used serial bus standard specifically designed for connecting external devices such as keyboards, mice, printers, and storage devices. While PCIe and SATA are also serial buses, PCIe is primarily used for internal components like graphics cards, and SATA is mainly for internal storage devices. IDE is an older parallel interface, not a serial bus.

Laser and Inkjet printers are non-impact printers because they do not strike the paper to produce an image, unlike impact printers such as Dot Matrix and Daisy Wheel printers which physically impact the paper.

The Address Bus is a physical part of the computer's architecture that carries the addresses of data between the processor and memory or peripherals. It is part of the system bus that connects various components, allowing the CPU to communicate with memory and I/O devices. While the motherboard physically holds and connects components, the Address Bus specifically refers to the physical lines that carry address signals, making it responsible for connecting components at the data communication level. The other options (Path, Route, All of these) are vague or incorrect in this context.