Exam-style question
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Explain how a digital camera and a laser printer perform different roles in a document-production workflow. Include the purpose and principle of operation of each device.
Model answer
What a good answer should say
- A digital camera is an input device.
- It uses a light-sensitive sensor to capture an image and converts the detected light into digital data that can be stored or processed.
- It could be used to obtain a photograph or another visual image for inclusion in a document.
- A laser printer is an output device.
Explanation
Why this works
The answer identifies the direction of data flow and explains the operating principle of both devices. It also links each device to a suitable role: capturing image data for the camera and producing physical printed output for the laser printer.
Common mistake
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