Question
Which of the following devices functions as both an input and an output device?
The correct answer is
Touchscreen
Understanding Input and Output Devices
Computer devices are categorized based on their function:
- Input Devices: Allow users to send data or commands to the computer. Examples include keyboards and mice.
- Output Devices: Receive data from the computer to present it to the user. Examples include monitors and printers.
- Input/Output (I/O) Devices: Can perform both functions, sending data to and receiving data from the computer.
Device Functionality Analysis
Let's examine the options provided:
| Device | Primary Function | Input/Output Capability |
|---|---|---|
| Printer | Output (Prints documents) | Output Only (Standard printer) |
| Speaker | Output (Produces sound) | Output Only |
| Touchscreen | Input (Detects touch) & Output (Displays information) | Input and Output |
| Keyboard | Input (Sends keystrokes) | Input Only |
Identifying the Dual Function Device
A Touchscreen is unique among the options because it allows users to interact with the computer by touching the screen (input), while simultaneously displaying visual information (output), similar to a standard monitor.
Therefore, the device that functions as both an input and an output device is the touchscreen.
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Important Questions from Hardware
- Which of the following is a primary memory of a computer?
- Data stored on a hard disk must be transferred to which memory unit before the CPU can access it?
- In a certain code language, 'light reveals truth' is coded as 'rn ea kw' and 'truth guides paths' is coded as 'ib rn xu'. How is 'truth' coded in the given language?
- Which of the following is NOT an output device?
- An integrated circuit is commonly known as a:
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