INPUT AND OUTPUT DEVICES
Input Device:
An input device is any hardware that is used to provide data and information and control signals to an information processing system such as computer or information device. Common input devices include keyboards,mouses and touch screens which are used to enter commands and data directly. Other examples of input devices are joysticks,microphones,scanners and microphones.
Difference between input and output devices are given below:
1.An input device is any hardware which is used to enter data and instructions into a computer. And an output device is any hardware that is used to receive data from a computer to perform a task.
2. An input device can send data to another device but it cannot receive data from another device. An output device can receive data from another device and generate output with that data but it cannot send data to another device.
3. Input devices are necessary for a computer to receive commands from it's users and data to process. Output devices are necessary for a computer to share it's results and prompt users for more information and commands.
4. Input devices are controlled by the users. Where as output devices are controlled by the computer.
5. Input devices are relatively complicated as they have complex coding that ensures that the user can interact with the computer correctly. Output devices are much simpler for the user since they only see the results and do not have to learn the processes.
6. Examples of input devices include keyboard,mouse,microphone,webcam,image scanner, pointing device,touch screens,joystick,graphics table etc. Examples of output devices include printer,monitor,speakers, computer output microfilm etc.
Output Device:
An output device is any hardware component that uses received data from a computer to perform a task. The data received by the output device can be anything. For example text,graphic,tactile,audio or video. An output device can receive data from another device and generate output with that data but it cannot send data to another device. Few examples are microphone,printer,monitor,headphone.
Difference between input and output devices are given below:
1.An input device is any hardware which is used to enter data and instructions into a computer. And an output device is any hardware that is used to receive data from a computer to perform a task.
2. An input device can send data to another device but it cannot receive data from another device. An output device can receive data from another device and generate output with that data but it cannot send data to another device.
3. Input devices are necessary for a computer to receive commands from it's users and data to process. Output devices are necessary for a computer to share it's results and prompt users for more information and commands.
4. Input devices are controlled by the users. Where as output devices are controlled by the computer.
5. Input devices are relatively complicated as they have complex coding that ensures that the user can interact with the computer correctly. Output devices are much simpler for the user since they only see the results and do not have to learn the processes.
6. Examples of input devices include keyboard,mouse,microphone,webcam,image scanner, pointing device,touch screens,joystick,graphics table etc. Examples of output devices include printer,monitor,speakers, computer output microfilm etc.
The process involved in getting data into the computer involves both input and output devices. Data is a collection of raw facts such as:
1. Numbers
2. Words
3. Measurements
4. Observations
It is an operation that performs upon raw facts whether or not by automatic means such as collection,recording,organization,storage or alternation to covert it into useful information. Data processing usually involves three basic activities including input,process, output. Input is a process through which data collected is transformed into a form that the computer can understand. The activities carried out in data input are data collection,data encoding,data transmission and data communication. After completing the mentioned processes we have to transform raw data into information by performing under actual data manipulation techniques. CPU is used to process data according to given instructions. Softwares is used to give instruction to process data. Now the output is generated. Output is where processed data is present to users as useful information. Activities which are carried out in output are decoding, communication and retrieval. That's how the data is processed into the computer.
An additional step to the processing cycle is the storage cycle in which the data is stored.
Comments
Post a Comment