input and output devices

An input device is a hardware component that allows users to interact with a computer system by inputting data or commands.

A keyboard is an input device that allows users to input text and commands by pressing keys.

The primary function of a mouse is to navigate the computer screen and click on items.

A touchscreen is an input device that allows users to interact with the device by touching the screen, commonly found on smartphones and tablets.

The main purpose of a scanner is to digitise physical documents or images, converting them into a format that the computer can process.

A biometric device is an input device used for security purposes to verify a user's identity, such as fingerprint scanners or facial recognition systems.

A graphics tablet is used to allow artists and designers to draw or sketch directly onto a computer, particularly useful for graphic design and 3D modelling.

False. A joystick is primarily used for computer games, especially flight simulators, allowing users to control movement more fluidly than with a keyboard or mouse.

A barcode scanner is an input device that scans barcodes, typically used in retail and inventory management.

The main function of a microphone as an input device is to capture audio input, which can be used for voice commands, recording audio, or video conferencing.

An output device is a hardware component that receives information from a computer system and presents it to the user in a comprehensible form.

A monitor is an output device that displays visual output from the computer, including text, images, and videos.

The primary function of a printer is to produce a hard copy of digital documents or images.

Speakers are output devices that output audio from the computer, such as music, sound effects, or voice.

A Braille display is used to output information in Braille, allowing visually impaired users to read text from the computer.

A plotter is an output device used for printing large, high-quality diagrams and designs, often used in engineering or architecture.

The main purpose of a projector is to project the computer's display onto a large screen or wall, useful for presentations or movie viewing.

False. Headphones are considered output devices that output audio directly to the user, providing a more personal and potentially immersive experience.

A Virtual Reality (VR) Headset is an output device that provides an immersive visual and audio output, primarily used for gaming and virtual simulations.

An example of a computer-controlled machinery output device is an actuator.

A sensor is an input device that measures a physical property of its environment such as light levels, temperature, or movement.

A monitoring system is a system that tracks the state of a system, gathers data, and may issue warning messages.

A control system is a system that controls based upon the input from sensors, such as starting a heater when water temperature falls below an acceptable level.

A feedback loop is a process where outputs are recycled and used as inputs, creating a continuous cycle.

An acoustic sensor measures sound levels.

An accelerometer is a sensor that measures acceleration rate, tilt, and vibration.

A humidity sensor is typically used to monitor humidity in greenhouses.

True. An infra-red sensor is used to detect motion or a heat source.

A pH sensor is a device that measures the acidity or alkalinity of a substance.

A proximity sensor would be used to help drivers when reversing.