Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Comptia A+ 220-801 > Comptia A+ 220-801 Chapter 4 > Flashcards

Comptia A+ 220-801 Chapter 4 Flashcards

1
Q

The primary method of getting information out of a computer is to use a computer ? pg 198

A

video display unit (VDU)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the two types of signals used in monitors today? pg 198

A

Digital and Analog

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Their are 6 types of VDU s. What are they?

A 
CRT
 Liquid crystal display
LED displays
Plasma
OLED
Projection systems
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is Dot Pitch? PG 200

A

is the measurement between the same spot in two vertically adjacent dot trios.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the average measurement of a dot pitch? PG 200

A

0.28mm to 0.32mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How is the resolution defined? pg 200

A

Resolution is defined by how many software picture elements (pixels) are used to draw the screen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a Advantage of having a higher resolution? pg 200

A

more information can be displayed in the same screen area.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a disadvantage of having a higher resolution? pg 200

A

a disadvantage is that the same objects and text displayed at a higher resolution appear smaller and might be harder to see.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

They are called “plasma” displays because they use small cells containing electrically charged ionized gases, which are plasma pg 203

A

Plasma Displays

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is OLED? pg 206

A

organic light-emitting diode (OLED) is a light-emitting diode (LED) in which the emissive electroluminescent layer is a film of organic compound which emits light in response to an electric current.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How is the brightness of a projector measured? pg 207

A

This brightness is measured in lumens. A lumen (lm) 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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is refresh rate in CRT monitors? pg 209

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is Degaussing?

A

is the process of decreasing or eliminating a remnant magnetic field. It is named after the gauss, a unit of magnetism, which in turn was named after Carl Friedrich Gauss.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the 5 primary groups of video adapters? pg 221

A 
Monochrome
CGA
EGA
VGA
DVI, HDMI, and other modern digital video
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What was the first video technology for PCs? pg 221

A

monochrome

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Who developed the first adapter known as MDA (Monochrome Display Adapter) and what was the resolution?

A

IBM and 720x350 pixels

17
Q

What is SVGA and what resolution did it support?

A

a set of graphics standards designed to offer greater resolution than VGA. SVGA supports 800 x 600 resolution, or 480,000 pixels.

18
Q

Describe Aspect Ratio? pg 224

A

The term aspect ratio refers to the relationship between the horizontal and vertical pixel counts that a monitor can display.

19
Q

Whats the MAX Resolution of SXGA+?

A

1400 x 1050

20
Q

What is the contrast ratio? pg 226

A

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.

21
Q

Whats the difference between Contrast Ratio vs Contrast?

A

Contrast ratios are generally fixed measurements that become selling points for the monitors. Contrast, on the other hand, is an adjustable setting on all monitors (usually found alongside brightness) that changes the relative brightness of adjacent pixels.

22
Q

What do the i and P stand for in 1080i and 1080p pg 224

A

The i in 1080i refers to interlaced—vs. progressive (1080p) scanning

23
Q

Plasma displays have always been expected

to have contrast ratios of around what?

A

5,000:1 or better.

24
Q

Whats the difference between Active Matrix and Passive Matrix?

A

An active-matrix display, also known as a TFT (thin-film transistor) display, uses a separate transistor to apply charges to each liquid crystal cell and thus displays high-quality color that is viewable from all angles.

25
Q

Passive Matrix pg 202

A

A passive-matrix display uses fewer transistors, requires less power, and is less expensive than an active-matrix display. The color on a passive-matrix display often is not as bright as an active-matrix display. Users view images on a passive-matrix display best when working directly in front of it.

26
Q

A special metallic screen called a _________________

(in most implementations) has holes spaced and angled in an extremely precise manner

A

shadow mask

27
Q

1024/768

A

4.3=1.3

28
Q

16.9

A

1.7

29
Q

16:10

A

1.6

Comptia A+ 220-801 (20 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions