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Comptia ITF+ > Module Thirteen > Flashcards

Module Thirteen Flashcards

1
Q

What is system memory?

A

RAM. The main storage area for programs and data when the computer is running.

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2
Q

What does DRAM stand for?

A

Dynamic Random Access Memory

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3
Q

What is System Ram?

A

DRAM

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4
Q

How does DRAM work?

A

It stores each data bit as an electrical charge within a single ‘bit cell’. The electrical charge dissipates and the memory is lost if there is no power to refresh the cell.

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5
Q

What does SDRAM stand for?

A

Synchronous DRAM

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6
Q

What does synchronous mean?

A

Existing or occurring at the same time.

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7
Q

What does DIMM stand for?

A

Dual Inline Memory Module

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8
Q

What does SO-DIMM stand for?

A

Small Outline Dual Inline Memory Module

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9
Q

What is SDRAM synchronized to?

A

The system bus.

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10
Q

How many bits of bus data does SDRAM have?

A

64-bits

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11
Q

What does it mean to have a 64-bit data bus?

A

It means that in each clock cycle, 64 bits of information can be delivered to the CPU.

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12
Q

What does DDR SDRAM stand for?

A

Double Data Rate Synchronized Dynamic Random Access Memory.

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13
Q

DDR SDRAM can also be referred to as just what?

A

DDR

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14
Q

DDR SDRAM has a feature called “double pumped”. What does “double pumped” mean?

A

SDRAM has for instance a 64-bit clock cycle. How a clock cycle works it, there is a low and high state. In each clock cycle 64 bits of information are processed.

With DDR SDRAM there is 64 bits processed in the low state of a clock cycle and 64 bits processed in the high state of the clock cycle. Doubling the amount of data processed per clock cycle.

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15
Q

What would the maximum data rate be for 64-bit DDR SDRAM if the bus speed is 100MHz? Answer in MBps. Explain your answer.

A

1600MBps 64 bits (low state) + 64 bits (high state) * 100/8.

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16
Q

How did DDR2, DDR3, and DDR4 increase bandwidth? And what’s the drawback?

A

By increasing bus speeds instead of the speed of the actual memory chips. Latency is the drawback.

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17
Q

What type of packaging do DDR2, DDR3, and DDR4 use?

A

DIMM and SO-DIMM

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18
Q

Can I use DDR3 modules with DDR4 motherboard?

A

No, the form factors of the edge connectors are different.

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19
Q

HDD (Hard Disk Drives) are made up of what three things?

A
  1. They’re encoded magnetically.
  2. They’re encoded magnetically on coated glass or plastic platters.
  3. Those platters are accessed by “drive heads”.
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20
Q

What are the two formats for HDDs?

A
  1. Desktop 3.5”
  2. Laptop and external hard drives 2.5”
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21
Q

What is the memory capacity range of HDDs?

A

100GB-10TB

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22
Q

What does RPM stand for?

A

Revolutions Per Minute

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23
Q

How fast can high performance HDDs go?

A

15000 RPM

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24
Q

How fast can budget to midrange HDDs go?

A

5400-7200 RPM

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25
Q

How is “access time” measured?

A

Milliseconds

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26
Q

How fast might a HDDs access time be?

A

Below 4ms for a high end one and around 9ms for a typical one.

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27
Q

What does SATA stand for?

A

Serial Advanced Technology Attachment

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28
Q

What type of interface do modern PC’s and laptops use?

29
Q

Minimum amount of SATA ports on a modern motherboard?

30
Q

A SATA port can support how many drives?

31
Q

Why might I not want a 3.5” external HDD?

A

One that big requires a separate power supply. a 2.5” external HDD doesn’t.

32
Q

What are the four ports that will come with an external HDD?

A
  1. USB
  2. Firewire
  3. eSATA
  4. Thunderbolt
33
Q

What does NAS stand for?

A

Network Attached Storage

34
Q

Bandwidth for USB 2?

35
Q

Bandwidth for USB 3

36
Q

Bandwidth for USB 3.1?

37
Q

Bandwidth for Thunderbolt 2?

38
Q

Bandwidth for Thunderbolt 3?

39
Q

Why were SSDs designed?

A

To replicate or supplement the HDD.

40
Q

What type of memory does SSD use?

A

Flash memory

41
Q

True or False. Flash memory/SSD uses a transistor-based technology?

42
Q

What does CDs stand for?

A

Compact Discs

43
Q

What does DVDs stand for? There are two possibilities.

A
  1. Digital Video Discs
  2. Digital Versatile Discs
44
Q

What does BDs strand for?

A

Blu-ray Discs

45
Q

Why are CDs, DVDs, and BDs called optical drives?

A

Because a laser is used to read data from the discs.

46
Q

What does CD-ROM stand for?

A

Compact Disc Read-Only Memory

47
Q

Why was Blu-ray so popular?

A

You could watch High Def movies and computer games on them.

48
Q

Memory capacity of CD?

49
Q

Memory capacity of DVDs?

A

up to 17GB.

50
Q

What does CD-R stand for?

A

Compact disc recordable

51
Q

CD-R is a type of WORM media. What does WORM stand for?

A

Write Once Read Many

52
Q

What does CD-RW stand for?

A

Compact Disc - Rewritable

Another word for rewritable would be “multisession”.

53
Q

What is the capacity of DVD-5?

54
Q

How many layers and sides does DVD-5 have?

A

1 layer
1 side

55
Q

What is the capacity of DVD-9?

56
Q

How many layers and sided does DVD-9 have?

A

2 layers
1 side

57
Q

What is the capacity of DVD-10?

58
Q

How many layers and sides does DVD-10 have?

A

1 layer
2 sides

59
Q

What is the capacity of DVD-18?

60
Q

How many layers and sides does DVD-18 have?

A

2 layers
2 sides

61
Q

What is the capacity of DVD-Video?

62
Q

How many layers and sides does DVD-Video have?

A

1 or 2 layers
1 or 2 sides

63
Q

What capacity does DVD-Audio have?

A

Curriculum doesn’t say.

64
Q

What is DVD-Audio most commonly used for?

A

Top Quality audio. Surround sound.

65
Q

What is the resolution picture of Blu-ray Discs?

66
Q

Give an example of an optical drive.

A

DVD player.

67
Q

How are Optical Drives rated?

A

Based on their data transfer speed.

Comptia ITF+ (13 decks)

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