Sim-Ex™ Practice Exams for A+ Core 1: Practice Questions

Mobile Devices Display

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Q2. Which of the following best describes the difference between a touchscreen display and a standard display?

A. A touchscreen adds an inverter to the display

B. A touchscreen adds a digitizer layer on top of the display

C. A touchscreen adds a backlight to the display

D. A touchscreen adds a plasma layer to the display

Correct Answer: B


A touchscreen adds a digitizer layer to the display. The digitizer detects the pressure of a touch. Inverters and backlights are found on LCD screens in laptops. Plasma displays popular in home big-screen TV systems, are made of small cells of ionized gas.

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