MCQ Test: Input and Output Devices - 2 - JKSSB Patwari MCQ

A joystick is a control device used in video games, virtual reality systems, and other applications. It consists of a stick that can be moved in different directions. The stick typically has a vertical orientation, meaning it stands upright.

When the joystick is moved in any direction, the corresponding movements are detected and translated into input signals by the system it is connected to. In the context of controlling a graphic cursor, such as in a computer or gaming system, moving the joystick up or down causes the cursor to move vertically on the screen.

Therefore, when you move the joystick stick upwards, the graphic cursor will move upwards as well, and when you move the joystick stick downwards, the cursor will move downwards. The vertical motion of the joystick stick controls the vertical movement of the graphic cursor.

A writing tablet, also known as a graphics tablet or digitizer, is a device that can convert handwritten impressions or drawings into digital format. It consists of a flat surface on which you can write or draw using a stylus or pen-like instrument. The tablet captures the position and pressure of the stylus and converts it into coded characters and positional coordinates that can be inputted to a computer. This allows you to digitally record and manipulate your handwritten input, making it a useful tool for artists, designers, and individuals who prefer handwriting over typing.

Function keys are present on the top row of a keyboard. They are labeled as F1, F2, F3, and so on, up to F12. These keys typically have various predefined functions assigned to them, which can vary depending on the operating system and software being used. They are commonly used for shortcuts and quick access to specific features or commands in applications and programs.

Dot-matrix, Deskjet, Inkjet, and Laser are all types of printers. These terms refer to different printing technologies used in printers to produce hard copies of digital documents or images.

1. Dot-matrix printers use a matrix of small pins to strike an ink ribbon, creating patterns of dots that form characters and images on paper.
2. Deskjet is a brand of inkjet printers manufactured by Hewlett-Packard (HP). Inkjet printers spray tiny droplets of ink onto the paper to create text and images.
3. Inkjet printers, in general, use the inkjet technology to produce prints by spraying ink onto the paper.
4. Laser printers use a laser beam to form an electrostatic image on a drum. The drum then attracts toner (powdered ink), which is transferred onto paper and fused using heat, creating high-quality prints.

Therefore, all of these are different types of printers used for various printing needs.

A scanner is a light-sensitive device that converts physical images, such as drawings, printed text, or photographs, into digital form. It works by capturing the image using a combination of sensors and light sources, and then converting it into a digital format that can be stored, edited, and manipulated on a computer.

When you place a document or image on the scanner's glass surface and initiate the scanning process, the scanner moves a scanning head or a set of sensors across the document, capturing the image line by line. The sensors detect the intensity and color of the light reflected off the document, and this information is then converted into digital data, typically in the form of pixels.

Scanners are commonly used for tasks such as scanning documents, photos, and artwork for archival purposes, creating digital copies, and performing optical character recognition (OCR) to convert printed text into editable digital text.

Laser printers belong to the category of page printers. Page printers are a type of printer that processes and prints an entire page at a time. They are designed to produce high-quality prints and are commonly used in offices, homes, and businesses for various printing needs.

Laser printers use a laser beam to create an electrostatic image on a drum. This image is then transferred onto paper and fused using heat to produce the final print. Laser printers are known for their fast printing speeds, sharp text and graphics, and precise output.

On the other hand, line printers (option A) are a type of printer that prints one line at a time and are typically used for high-volume printing tasks. Band printers (option C) and dot matrix printers (option D) are also types of printers, but they use different printing technologies than laser printers.

USB stands for Universal Serial Bus. It refers to a standard port type that is widely used for connecting various devices to a computer or other electronic devices. USB ports are rectangular in shape and are commonly found on computers, laptops, gaming consoles, smartphones, and other devices.

USB ports provide a standardized interface for connecting devices such as external hard drives, keyboards, mice, printers, cameras, smartphones, and many other peripherals. They allow for data transfer, charging, and communication between the device and the host device (such as a computer).

USB also encompasses the USB cables and connectors that are used to establish the connection between devices. There have been different generations and revisions of USB, with each iteration offering improvements in speed, power delivery, and capabilities. USB has become the de facto standard for connecting and interconnecting devices due to its versatility and widespread adoption.

Mouse, Keyboard, and Scanner are all examples of input devices.

1. Mouse: A mouse is an input device used to control the cursor or pointer on a computer screen. It allows users to interact with graphical user interfaces by moving the mouse and clicking its buttons.

2. Keyboard: A keyboard is an input device that allows users to input alphanumeric characters and commands into a computer. It consists of a set of keys arranged in a specific layout, including letters, numbers, symbols, and function keys.

3. Scanner: A scanner is an input device used to convert physical images, documents, or text into digital form. It captures the image or text using light sensors and converts it into a digital format that can be stored, edited, or printed.

On the other hand, the other options have at least one output device included:

A. Mouse, Keyboard, Monitor: Monitor is an output device as it displays the visual output from the computer.

B. Mouse, Keyboard, Printer: Printer is an output device as it produces physical copies or hard copies of digital documents.

C. Mouse, Keyboard, Plotter: Plotter is an output device that draws or plots vector graphics on paper or other materials.

Therefore, the correct answer is D. Mouse, Keyboard, Scanner, as these are all examples of input devices.

Input devices are devices that allow users to input or capture data or information into a computer or electronic system. In the case of a digital camera, it captures images and videos through its lens and sensor, and then stores them in digital format such as JPEG, RAW, or other image file formats. These digital files can later be transferred to a computer or other storage devices for further processing, editing, or sharing.

Other examples of input devices include keyboards, mice, scanners, microphones, and graphics tablets. These devices allow users to input various types of data or information into a computer or electronic system.

MICR stands for Magnetic Ink Character Recognition. It is a technology used for the recognition and processing of information encoded in the form of characters printed with magnetic ink. MICR technology is commonly used in banking and financial institutions for processing checks and other documents.

The wheel located between the two standard buttons on a mouse is commonly known as the scroll wheel. Its primary function is to allow users to scroll through documents, web pages, and other content displayed on the screen. By rotating the wheel, you can move the content vertically or horizontally, depending on the application or settings. This scrolling action helps navigate through lengthy documents or websites without the need for excessive clicking or dragging.

The options A, B, and C (Scanner, Printer, and Monitor) are all examples of hardware devices. These devices are tangible physical components that can be touched and interacted with.

However, an interpreter is not a hardware device. It is a software component or program that translates and executes high-level programming code, typically line by line. Interpreters are used in programming languages to convert and execute the code in real-time.

Therefore, D. Interpreter is the correct answer as it is not an example of hardware.

Input devices are used to provide data or instructions to the computer system. They allow users to input information into the computer for processing. Examples of input devices include keyboards, mice, touchscreens, scanners, microphones, and more. These devices enable users to interact with the computer and provide commands or data for processing.

Output devices, on the other hand, are used to present or display data to the user. Examples of output devices include monitors, printers, speakers, and projectors. They allow the computer system to present processed information to the user in a usable format.

Keyboards are input devices that allow users to enter alphanumeric characters, symbols, and commands into a computer system. They typically consist of a set of keys arranged in a specific layout, such as the QWERTY layout commonly used in most English-speaking countries. Keyboards are widely used for various tasks, including typing documents, entering data into spreadsheets, sending emails, and interacting with software applications.

Therefore, D. Keyboard is the correct answer.

Hardware refers to the physical components of a computer system that can be seen and touched. This includes devices such as keyboards, mice, monitors, printers, scanners, speakers, and other input and output devices. Hardware is essential for the operation and functionality of a computer system.

Software, on the other hand, refers to the programs, instructions, and data that are stored and processed by the computer. While software interacts with the hardware to perform tasks, the term "hardware" specifically encompasses the physical devices themselves.

Therefore, D. Hardware is the correct answer.

A joystick is a type of input device used for controlling the movement of a cursor or character on a screen. It typically consists of a stick or lever that can be moved in different directions, and it may also have additional buttons for various functions. The button located on the top of the joystick is commonly used as the primary selection button. By pressing this button, users can choose or activate the option pointed to by the cursor on the screen.

Therefore, D. Top is the correct answer.

A mouse is a device that allows users to control the cursor or pointer on a computer screen. By moving the mouse on a flat surface, such as a desk, the cursor can be moved in different directions. By clicking buttons on the mouse, users can select and interact with objects on the screen. The mouse is commonly used to navigate graphical user interfaces (GUIs) and perform various operations without relying on the keyboard.

A printer is a device primarily used to provide hardcopy output of digital information stored in a computer or other electronic device. It creates a physical representation of the digital data onto paper or other types of media, such as transparencies or labels. Printers work by transferring ink or toner onto the media to create text, images, or graphics.

CRT (Cathode Ray Tube) is a type of display technology used in older computer monitors and televisions. It is not primarily used for providing hardcopy output.

A computer console is a term that typically refers to the physical equipment used to control and monitor a computer system. It usually includes a keyboard, monitor, and mouse. While a console can display information, it is not primarily used to provide hardcopy output.

A card reader is a device used to read data from memory cards or magnetic stripe cards, such as credit cards. It is not primarily used to provide hardcopy output.

Therefore, the correct answer is C. Printer.

A modem, short for modulator-demodulator, is a device that converts digital signals from a computer into analog signals that can be transmitted over a telephone line. It modulates the digital data into analog signals for transmission and demodulates the analog signals back into digital data at the receiving end.

Teleport is not a device that converts computer output for transmission over a telephone line. It is commonly used to refer to a fictional technology for instant transportation.

A multiplexer is a device that combines multiple input signals into a single output signal. It is not specifically designed for converting computer output for transmission over a telephone line.

A concentrator is a device used in networking to collect data from multiple devices and transmit it over a single communication channel. It is not primarily used for converting computer output for transmission over a telephone line.

Therefore, the correct answer is D. Modem.

Computer speakers and headphones are output devices. They are used to reproduce sound generated by the computer or other audio sources. When audio data is processed by the computer's sound card or audio interface, it is sent to the speakers or headphones, which convert the electrical signals into audible sound waves.

Input devices are used to provide data or commands to the computer, such as keyboards, mice, or microphones. Speakers and headphones, on the other hand, receive audio signals from the computer and produce sound output, making them output devices.

Software refers to the programs and instructions that run on a computer, and it is not the correct categorization for computer speakers or headphones.

Therefore, the correct answer is D. Output.