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CompTIA A+ > Chapter 4 > Flashcards

Chapter 4 Flashcards

1
Q

The primary method of getting information out of a computer is to use what. pg-198

A

Computer video display unit (VDU)

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2
Q

(CRT) Stands for what. pg-198

A

Cathode Ray Tube

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3
Q

(LCD) Stands for what. pg-198

A

Liquid Crystal Display

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4
Q

The different VDU types: pg-199

A 
CRT
Liquid crystal display
LED display
Plasma
OLED
Projection systems
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5
Q

Shoots a beam of electrons toward the back side of the monitor screen. pg-199

A

Electron gun

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6
Q

The back of the screen is coated with special chemical dots called what. pg-199

A

Phosphors

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7
Q

A special metallic screen called a _______ has holes spaced and angled in an extremely precise manner. pg-199

A

Shadow mask

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8
Q

Is the measurement between the same spot in two vertically adjacent dot trios. pg-200

A

Dot pitch

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9
Q

Is defined by how many software picture elements pixels are used to draw the screen. pg-200

A

Resolution

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10
Q

An active- matrix screen is made up several independent LCD pixels. pg-201

A

Active matrix

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11
Q

Display does not have a dedicated transistor for each pixel or subpixel but instead a matrix of conductive traces.pg-202

A

Passive matrix

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12
Q

Is a variation of the passive- matrix display.pg-202

A

Dual scan

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13
Q

Because the computer takes hundreds of milliseconds to change a pixel in passive-matrix display the response of the screen to rapid changes is poor causing for example an effect known as what. pg-203

A

Submarining

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14
Q

Is a panel that fits over the front of a display and through a polarization affect intentionally limits the viewing angle of the monitor. pg 203

A

Privacy filter

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15
Q

These same filters as well as specialty versions can act as ________ brightening and clarifying the image appearing on the monitor’s screen. pg-203

A

Antiglare filters

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16
Q

higher refresh rates in LCDs lead to an unwanted artificial or noncinematic quality to video known as the what. pg-204

A

soap-opera effect

17
Q

unlike LED display really are the image producing parts of the display not just the light source. pg 204

A

(OLED) Organic light emitting diode

18
Q

What does HID stand for. pg-207

A

High-intensity discharge

19
Q

Is a unit of measure for the total amount of visible light that the projector gives off based solely on what the human eye can perceive and not also on invisible wavelengths. pg-207

A

Lumen (lm)

20
Q

technically the vertical scan frequency and specifies how many times in one second the scanning beam of electrons redraws the screen in CRTs. pg-209

A

Refresh rate

21
Q

Display adapters through the years can be divided into five primary groups: pg-220

A 
monochrome
CGA
EGA
VGA
DVI, HDMI, and other modern digital video
22
Q

is the reduction of the magnetic field of an object. pg 217

A

Degaussing

23
Q

the Hercules graphics card (HGC) introduced by Hercules computer technology had a resolution of 720 x 350 and could display graphics as well as text. It did this by using two separate modes: pg-221

A

text mode= that allows the adapter to optimize its resources for displaying predrawn characters from its onboard library.
graphics mode= that optimized the adapter for drawing individual pixels for onscreen graphics.

24
Q

(CGA) stands for what. pg-221

A

color graphics adapter

25
Q

(EGA) stands for what. pg- 222

A

Enhanced graphics adapte

26
Q

(VGA) stands for what. pg-222

A

video graphics array

27
Q

(MCA) stands for what. pg-223

A

micro channel architecture

28
Q

(XGA) stands for what. pg-223

A

extended graphics

29
Q

Is the measure of the ratio of the luminance of the brightest color to that of the darkest color the screen is capable of producing. pg 226

A

contrast ratio

30
Q

is a adjustable setting on all monitor usually found alongside brightness that changes the relative brightness of adjacent pixels.

A

contrast

CompTIA A+ (20 decks)

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