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Display Technologies

Monitor types and display standards.

Display technologies cover various types of monitors, such as LCD, LED, and OLED, along with display standards, resolutions, and refresh rates.
5 minutes 5 Questions

Display technologies are central to modern computing, playing a key role in how users interact with digital content. Various types exist: 1. LCD (Liquid Crystal Display): Uses liquid crystals that twist and untwist to control light passage. Two main types include TN (Twisted Nematic) panels offeri…

Concepts covered: Color Depth, 3D Displays, Quantum Dot Displays, Refresh Rate, LCD and LED, Touchscreen Displays, Resolution and Aspect Ratio, Display Connectors, OLED Displays, Plasma Displays

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CompTIA A+ - Display Technologies Example Questions

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Question 1

Which technology is used in OLED displays to create each individual pixel?

Correct Answer: Organic light-emitting diodes

The correct answer is 'Organic light-emitting diodes'. OLED stands for Organic Light-Emitting Diode, which is the core technology used in OLED displays to create each individual pixel. OLED technology uses organic compounds that emit light when an electric current is applied. Each pixel in an OLED display is made up of these organic light-emitting materials, allowing for self-illumination and precise control over color and brightness at the pixel level. Quantum dot light-emitting diodes are a different technology used in some LED-LCD displays to enhance color reproduction, but they are not the primary technology in OLED displays. Liquid crystal with LED backlight refers to traditional LCD technology, which uses liquid crystals to control light from a separate backlight source. This is not the technology used in OLED displays. Micro-LED is another emerging display technology that uses tiny inorganic LED elements for each pixel, but it is distinct from OLED and not used in OLED displays. OLED technology offers advantages such as deeper blacks, better contrast ratios, and wider viewing angles compared to other display technologies, making it the correct choice for this question.

Question 2

You are setting up a triple monitor setup for a gamer. Which of the following monitor features will provide the most smooth gaming experience?

Correct Answer: All monitors with an equal and high refresh rate

Having all monitors with an equal and high refresh rate ensures a smooth gaming experience, as it reduces screen tearing and provides consistent visuals across all screens.

Question 3

A customer complains their new 4K monitor is only displaying 1080p resolution despite having the proper 4K resolution settings. What display connector should you check to ensure they have the correct support?

Correct Answer: DisplayPort

DisplayPort is the correct answer because it supports resolutions up to 8K, including 4K. VGA and DVI do not have the bandwidth to support 4K resolutions. While HDMI can support 4K, HDMI version 1.2 specifically does not have the necessary bandwidth. The customer's issue is likely due to using an unsupported display connector that cannot handle the 4K signal from the graphics card to the monitor. Checking and ensuring they are using DisplayPort should resolve the problem.

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