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36.
Which video technology has a resolution of 1280n1024?
- A.SVGA
- B.SXGA
- C.WSXGA
- D.UXGA
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| SXGA has a resolution of 1280n1024. Consult Table 4.1 for the resolutions that characterize other technologies. |
37.
What does a Q in video resolution names, such as QXGA, refer to?
- A.Both the horizontal and vertical components of the resolution have been quadrupled.
- B.The resolution is cut to one-fourth.
- C.The technology is faster.
- D.Both the horizontal and vertical components of the resolution have been doubled.
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Although the Q stands for quad, the pixel count for each axis is only doubled, resulting in four times as many total pixels. |
38.
What is contrast ratio?
- A.The ratio of luminance between the darkest and lightest colors that can be displayed
- B.A term that was used with CRTs but has no meaning with LCDs
- C.The ratio of luminance between two adjacent pixels
- D.Something that can be corrected through degaussing
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Contrast ratio is a selling point for LCDs. Higher contrast ratios mean darker blacks and brighter whites. The measure of luminance between adjacent pixels is known as contrast, not contrast ratio. |
39.
Which of the following display types physically creates the image displayed in a manner
most similar to OLED displays?
- A.CRT
- B.LED
- C.LCD
- D.Plasma
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Both OLED and plasma displays use electrodes to excite the material in a sealed chamber to produce light. Each in its own way uses that light to create red, green, or blue light within individual subpixels. Plasma is more akin to CRT in that they both use chemical phosphors to create the red, green, and blue hues. In contrast to the way CRTs and PDPs produce color, OLEDs natively produce these colors of light without the use of filters or phosphors. |
40.
When approaching an older LCD panel from the side, you don’t realize there is actually an
image displayed on it until you are almost in front of it. Which two options might explain
why you could not detect the image from the side? (Choose two.)
- A.Older LCDs were equipped with a motion sensor.
- B.Multiple monitors are in use, and the LCD is the secondary monitor, resulting in its poor oblique visibility.
- C.The user has a privacy filter in place.
- D.The monitor employs active-matrix pixel addressing.
- E.It is a passive-matrix LCD panel.
- Answer & Explanation
- Report
Answer : [C,E]
Explanation :
Explanation :
| Older LCD panels might have employed a passive-matrix addressing for their pixels, resulting in a poorer viewing angle than that created by active-matrix LCD panels. Additionally, privacy filters intentionally limit the angle of screen visibility by changing the light’s polarization when viewed from the side. Antiglare filters might unintentionally do the same thing. |
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