name four input and four output devices, and write their uses.
Answers
Answer:
the four output devices are as follow:
1) Monitor – This is the most common computer output device. It creates a visual display by the use of which users can view processed data. Monitors come in various sizes and resolutions.
2) Printer – this device generates a hard copy version of processed data, like documents and photographs. The computer transmits the image data to the printer, which then physically recreates the image, typically on paper.
3) Speakers – speakers are attached to computers to facilitate the output of sound; sound cards are required in the computer for speakers to function. The different kinds of speakers range from simple, two-speaker output devices right the way up to surround-sound multi-channel units.
4)Headset – this is a combination of speakers and microphone. It is mostly used by gamers, and is also a great tool for communicating with family and friends over the internet using some VOIP program or other.
the four input devices are as follow:
1) keyboard- Keyboards are the most common type of input device. Before keyboards, interaction with computers was generally carried out using punch cards and paper tape. Most English language keyboards use the QWERTY layout for the alphabetic keys, which are surrounded by number, symbol, function, and other key types. By pressing the relevant keys, a user can feed data and instructions to the computer.
2) mouse- A mouse interacts with a computer through a process known as "point and click." Essentially, when a user moves the mouse on the mouse pad, the pointer moves in a corresponding direction on the computer's monitor screen. The concept of a computer mouse has its roots in the trackball, a related pointing device invented in 1946 that used a "roller ball" to control a pointer. Most modern computer mice have two buttons for clicking and a wheel in the middle for scrolling up and down documents and web pages.
3) touchpad- Also known as a trackpad, a touchpad is a common substitute for a computer mouse. It is essentially a specialized surface that can detect the movement of a user's finger and use that information to direct a pointer and control a computer. Touchpads were first introduced for laptops in the 1990s, and it's now rare to find a laptop without one.
4) scanner- The word "scanner" can be used in a number of different ways in the computer world, but here I am using it to refer to a desktop image scanner. Essentially, a scanner is an input device that uses optical technology to transfer images (or sometimes text) into a computer, where the signal is converted into a digital image. The digital image can then be viewed on a monitor screen, saved, edited, emailed, or printed.
Answer:
same as upper
Explanation:
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