JKSSB Mock Tests

Which input device uses a light-sensitive detector to select objects on a CRT screen?

A. Light pen
B. Stylus
C. Touch screen
D. Digitizer
Answer: Option A
Solution (By JKSSB Mock Tests Team)
A light pen detects the electron beam scan of a CRT to determine screen position; obsolete now with LCDs.
This Question Belongs to: Computer mcqs Computer set 2

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