Among Scanner, Plotter, Light pen, Projector, and Speaker, which set contains…
2024
Among Scanner, Plotter, Light pen, Projector, and Speaker, which set contains all and only the computer output devices?
Answer: D. Plotter, Projector, and Speaker — ConceptA computer input device sends data or control signals into the computer, whereas an output device presents processed information from the computer to…
- A.
Scanner, Plotter, Projector, and Speaker
- B.
Projector and Speaker
- C.
Scanner, Plotter, and Light pen
- D.
Plotter, Projector, and Speaker
Attempted by 82 students.
Show answer & explanation
Correct answer: D
Concept
A computer input device sends data or control signals into the computer, whereas an output device presents processed information from the computer to the user.
To identify an output-only set, classify every device by the direction in which information primarily flows and retain a set only when every member is an output device.
Application
Device | Direction | Primary role |
|---|---|---|
Scanner | Input | Converts paper documents or images into digital data for the computer. |
Plotter | Output | Produces large, precise drawings or graphics from computer data. |
Light pen | Input | Sends pointing or selection coordinates to the computer. |
Projector | Output | Displays the computer’s visual output on a larger surface. |
Speaker | Output | Converts the computer’s audio signal into sound. |
Contrast of the offered sets
Scanner, Plotter, Projector, and Speaker includes a scanner, which sends digitized data into the computer.
Projector and Speaker contains output devices, but it leaves out the plotter from the complete output-only set offered in the question.
Scanner, Plotter, and Light pen includes two input devices: the scanner and the light pen.
Cross-check and result
Removing the input devices—scanner and light pen—from the five named devices leaves plotter, projector, and speaker. Therefore, the output-only set is Plotter, Projector, and Speaker.