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Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 1000:  Multimedia

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VII  Chapter 1000: Test for Success Questions
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VIII  Chapter 1000: Test for Success Answers

1. What is the primary function of the video card?

A. Convert digital information into an analog signal that is sent to the monitor

B. Make pretty pictures

C. Convert analog information into a digital signal that is sent to the monitor

D. Act as an interface between the processor and the RAM

Explanation: A primary function of the video card is to take the digital information given to it by the processor and convert it into an analog signal that is sent to the monitor. Of all the other components in a PC the video card is definitely one of the hardest working as it is constantly sending a new signal to the monitor for display.

 

2. True or False: Today's video cards use the CPU's massive processing power to handle video signal conversion and calculations.

A. True

B. False

Explanation: Video cards started as simple devices with relatively little intelligence and simply did the video signal conversion and nothing else, which left the processor to handle all of the calculations needed to display all of the objects in a particular area of the screen.

 

3. Which of the following is referred to as the resolution of the display?

A. Vertical pixels by Horizontal pixels

B. Horizontal pixels by Vertical pixels

C. Refresh rate in Hertz

D. Color-depth

Explanation: The number of pixels used to make up the entire display is referred to as the resolution of the display. This is commonly expressed by multiplying the number of horizontal pixels by the number of vertical pixels. Commonly used image resolutions are 640x480, 800x600, and 1,024x768. By simply multiplying these numbers together you have the total number of pixels that make up the image display.

 

4. From which of the following is the term pixel derived?

A. Picture Element

B. Pix

C. 640x480

D. Dot

Explanation: A pixel is short for Picture Element. A single pixel is made up of 3 dots, red, green, and blue.

 

5. Pixels are made up of even small _________, ________ and _________ dots.

A. red, green, and blue

B. red, white and blue

C. red, yellow and blue

D. black, blue and red

Explanation: A pixel is made of red, green, and blue dots.

 

6. What video card milestone was achieved to relieve the burden of video processing from the processor?

A. Accelerated video cards

B. AGP

C. 32-bit True Color

D. Digital Audio Converter

Explanation: Video card makers created what came to be known as accelerated video cards, which took over the responsibility of re-calculating any changes in the display.

 

7. What item has a direct impact on the performance of the video card?

A. Video RAM

B. CPU MHz

C. Video chipset

D. Video Driver

Explanation: Just as the chipset on a motherboard contains a special logic circuit called a chipset that controls the interaction of all the various components in the computer and the processor, accelerated video cards have a similar logic circuit called the video chipset, or the video coprocessor, which has a direct impact on the performance of the video card. See heading Video Cards, subheading Video Chipset.

 

8. What agency or organization was responsible for creating a standard for controlling video output?

A. IEEE

B. ISO

C. W3C

D. The Video Electronics Standard Association, VESA

Explanation: The Video Electronics Standard Association, VESA, introduced a standard for high resolution BIOS code called the VESA BIOS Extensions, or VBE, because of the overwhelming number of different video card technologies, chipsets, and video BIOS program, and programming software. See History tip: Video Electronics Standards Association (VESA).

 

9. What factor or item limits the amount of the frame buffer?

A. The size of the video memory on the card

B. TCP/IP frame type

C. System memory

D. All of the above

Explanation: The advantage of having video memory integrated into the video card itself is that it can be designed and tuned for the specific task of displaying an image. The more video memory on the card, the larger the size of the frame buffer.

 

10. Which of the following memory types can be found on video cards?

A. Video RAM (VRAM)

B. Window RAM (WRAM)

C. Synchronous Dynamic Random Access Memory (SDRAM)

D. Multi-bank DRAM (MDRAM)

E. All of the above

Explanation: Video memory for the frame buffer has many types Here are some of the more common ones: VRAM, WRAM, SGRAM and MDRAM.

 

11. Which of the following are valid video card architectures? [Choose all that apply]

A. VGA

B. 8-bit ISA

C. 16-bit ISA

D. MCA

Explanation: Video cards can use any expansion bus architecture. VGA is a standard, not an architecture.

 

12. True or false: The AGP bus can run at the same frequency as the system bus.

A. True

B. False

Explanation: In theory, the AGP bus was designed to run at the same speed as the system bus, but that doesn't always seem to be the case.

 

13. What agency was responsible for insuring that a compatible video card could be used with a compatible monitor?

A. VESA

B. IEEE

C. CompTIA

D. OSI sub-committee

Explanation: The Video Electronics Standard Association (VESA) was formed to define a new set of standards that would be recognized by the industry because of all the different ways available to display video images.

 

14. What is one of the easiest ways of determining a monitor's capabilities?

A. The price

B. The maker

C. The resolution modes that it will support

D. The diagonal dimensions of the screen

Explanation: The resolution modes supported are on factor. Dot pitch and refresh rate are two other factors to consider when determining how monitors capabilities.

 

15. How should you set the refresh rate on your monitor?

A. Above 60 Hz

B. Through the start-up menu

C. 70 Hz

D. Any rate

Explanation: Because the American standard for electricity is set at 60 MHz is best to set your monitor have a refresh rate above that to avoid eyestrain. When the full refresh rate of your monitor is close to the electricity standard, the to attend to synchronize, thus creating eyestrain.

 

16. How does a computer interpret sound?

A. In analog mode

B. By using the modulate/demodulate method

C. In digital mode

D. Sampling

Explanation: Since computers communicate digitally, it must have a way to convert an analog sound (the wavelengths we humans hear) to a digital format, and does so through a process called sampling.

 

17. What does the acronym ADC stand for, and what is its purpose? [Choose two]

A. Analog to Digital Converter

B. Alternating Direct Current

C. Converts analog sounds to WAV files

D. Converts analog sounds to digital signals

Explanation: A device such as a microphone converts analog sounds into digital signals with an Analog to Digital Converter (ADC) for the very purpose it’s name implies.

 

18. In which two ways can sounds be created using the MIDI format? [Choose two]

A. AGP

B. FM Synthesis

C. Wavetable Synthesis

D. DAC

Explanation: Using the MIDI format, sounds can be created in FM synthesis or Wavetable synthesis. The 15-pin connector on the back of a standard sound card can be used as a MIDI port, which is designed to take digital signals produced by MIDI compatible instruments, such as a synthesizer, and record or play back the sounds through the computer.


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