Core 1: Mobile Devices
25 practice questions with explanations — 15 free to try
2 of these 25 questions are in the free 15-question taster · the full topic is part of Premium
PassNova has 25 CompTIA A+ practice questions on Core 1: Mobile Devices, each with a clear explanation. A 15-question taster is free with no sign-up; the full bank is part of PassNova Premium. Updated for 2026.
Core 1: Mobile Devices: example questions & answers
2 worked examples with answers and explanations below. Try 15 CompTIA A+ questions free in the browser; the full 25-question Core 1: Mobile Devices bank is part of PassNova Premium.
Which laptop component converts DC power into the high voltage needed to illuminate a CCFL backlight?
- ADigitizer
- BBacklight diode
- CInverter✓
- DCMOS battery
Answer: An inverter steps DC up to the high AC voltage a CCFL backlight needs. LED backlights do not require an inverter.
A user wants to replace a cracked laptop screen that responds to touch. Which component captures the touch input?
- ADigitizer✓
- BInverter
- CWebcam
- DLCD panel
Answer: The digitizer is the layer that converts physical touch into digital coordinates. The LCD only displays the image.