A+ V14 Mobile Device Camera and Biometric Sensors

1. Which biometric authentication method analyzes unique facial features for device unlock?

Fingerprint recognition

Voice recognition

Facial recognition

Gait recognition

2. What does electronic image stabilization (EIS) on mobile devices accomplish compared to optical stabilization?

Uses software to adjust pixels and reduce blur

Moves physical lens elements

Increases sensor resolution

Improves autofocus accuracy

3. Which mobile camera sensor specification determines the physical size of the image sensor?

Focal length

Sensor format or crop factor

ISO sensitivity

White balance

4. What is the main security advantage of using biometric authentication over PIN codes?

Faster processing speed

Biological traits are unique and difficult to replicate

Lower power consumption

Smaller storage requirements

5. Which mobile device feature uses multiple cameras to create a three-dimensional representation of objects?

Panorama mode

Time-lapse recording

3D scanning or depth sensing

Slow-motion video

6. What is the primary purpose of a mobile device's portrait mode or bokeh effect?

Increase overall image brightness

Blur background while keeping subject sharp

Enhance color saturation

Extend battery life

7. Which mobile biometric sensor uses infrared light to scan fingerprints beneath the skin surface?

Capacitive sensor

Optical sensor

Ultrasonic sensor

Thermal sensor

8. What does the term 'depth of field' refer to in mobile device photography?

Maximum zoom distance

Range of distance where image appears sharp

Number of camera lenses

Sensor pixel density

9. Which mobile device sensor detects ambient light and adjusts screen brightness automatically?

Accelerometer

Ambient light sensor

Gyroscope

Magnetometer

10. What is digital zoom on a mobile device, and how does it differ from optical zoom?

Digital crops pixels; optical uses lens elements

Digital is faster; optical is higher quality

Digital works in low light; optical requires bright conditions

Digital is lossless; optical introduces distortion

11. Which mobile device camera sensor type uses a rolling shutter mechanism that scans the image line by line?

CCD sensor

CMOS sensor

Infrared sensor

Thermal sensor

12. What does the aperture value (f-number) indicate in mobile camera specifications?

Maximum zoom capability

Lens opening size and light-gathering ability

Sensor resolution in pixels

Video recording frame rate

13. Which mobile camera technology uses artificial intelligence to enhance low-light photography?

Optical zoom

Computational photography

Manual exposure

Fixed aperture

14. What is the main function of a mobile device's front-facing camera?

Capturing high-resolution photos

Recording 4K video

Video calls and facial recognition

Night photography

15. Which biometric sensor on mobile devices captures unique ridge patterns for authentication?

Accelerometer

Fingerprint scanner

Proximity sensor

Barometer

16. What does megapixel (MP) measure in a mobile device camera?

Lens focal length

Total number of pixels in the sensor

Shutter speed capability

Maximum video frame rate

17. Which mobile device camera feature allows multiple exposures to be combined into a single image?

Panorama mode

Burst mode

HDR (High Dynamic Range)

Night mode

18. What is the primary advantage of optical image stabilization (OIS) in mobile cameras?

Increases sensor resolution

Reduces motion blur by moving lens elements

Improves autofocus speed

Enhances color accuracy

19. Which biometric authentication method measures the unique patterns of blood vessels in the eye?