Systems Architecture 7e Stephen D Burd - Test Bank Instant Download - Complete Test Bank With Answers Sample Questions Are Posted Below True / False 1. A storage device consists of a read/write mechanism and a storage medium. a. True b. False ANSWER: True POINTS: 1 REFERENCES: 151 …
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Systems Architecture 7e Stephen D Burd – Test Bank
Instant Download – Complete Test Bank With Answers
Sample Questions Are Posted Below
| True / False |
1. A storage device consists of a read/write mechanism and a storage medium.
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2. Wait states increase CPU and computer system performance.
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3. Primary storage extends the limited capacity of CPU registers.
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4. The CPU moves data and instructions continually between registers and primary storage.
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5. With current technology, secondary storage speed is typically faster than primary storage speed.
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6. Block size is normally stated in bytes and is generally the same between storage devices, especially in a single storage device.
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7. 512- and 4096-byte blocks are the most common data transfer units for magnetic disks.
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8. Volatility is a matter of degree and conditions.
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9. Magnetic tape and disk are considered volatile storage media.
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10. The physical structure of a storage device’s read/write mechanism and storage medium determines the ways in which data can be accessed.
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11. Serial access time depends on the current position of the read/write mechanism and the position of the target data item in the storage medium.
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12. Cost per unit decreases as an access method moves from serial to random to parallel.
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13. Secondary storage is generally expensive compared with primary storage.
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14. Capacitors can charge and discharge much faster than batteries.
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15. SRAM has higher density then DRAM.
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16. Electrical current can generate a magnetic field but a magnetic field cannot generate electricity.
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17. Disk drives share one set of read/write circuits among all read/write heads.
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18. HTH switching time is the most important component of access time.
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19. Because sequential access time is so much faster than average access time, disk performance is improved dramatically if related data is stored in sequential sectors.
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20. Communication channel capacity is generally a restriction on a single disk drive’s data transfer rate.
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21. Coercible material per sector is greater at the center than in the platter edge.
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22. To increase capacity per platter, disk manufacturers divide tracks into two or more zones and vary the sectors per track in each zone.
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23. Computing average access time is more complex when sectors are more densely packed on the platter’s outer portions because the assumption that an average access requires moving the read/write head over half the tracks is no longer valid.
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24. SSDs are much more tolerant to shock and other negative environmental factors commonly encountered with portable devices, such as multifunction cell phones, netbooks, and laptop computers.
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25. Magnetic disk drives have an advantage over SSDs in power consumption.
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26. Most optical storage media can retain data for decades because they aren’t subject to magnetic decay and leakage.
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27. Rewritable DVDs use a single standard adopted by the entire industry.
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28. Magnetic and optical storage are currently direct competitors.
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29. The write operation for recordable discs is destructive, so recordable disc formats can be written only one time.
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30. Magneto-optical technology peaked in the mid-1980s.
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| Multiple Choice |
31. The ____ is the device or substance that actually holds data.
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32. ____ is the most important characteristic differentiating primary and secondary storage.
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33. A ____ is a CPU cycle spent waiting for access to an instruction or data.
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34. ____ in the CPU are storage locations for instructions and data.
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35. Storage device speed is called ____.
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36. Access times for secondary storage devices are typically expressed in ____ or microseconds.
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37. ____ is a generic term for describing secondary storage data transfer units.
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38. A storage device or medium is ____ if it holds data without loss over long periods.
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39. A storage device or medium is ____ if it can’t hold data reliably for long periods.
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40. A ____ storage device stores and retrieves data items in a linear, or sequential, order.
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41. A ____ device isn’t restricted to any specific order when accessing data.
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42. Data is represented in the CPU as ____.
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43. The term ____ describes primary storage devices that are implemented as microchips, can read and write with equal speed, and can randomly access bytes, words, or larger data units.
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44. Modern computers use memory implemented with ____.
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45. ____ is implemented entirely with transistors.
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46. ____ stores each bit by using a single transistor and capacitor.
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47. Programs usually access instructions and data items ____.
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48. ____ is a read-ahead RAM that uses the same clock pulse as the system bus.
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49. Memory devices comprised of semiconductors and other forms of RAM with long-term or permanent data retention are generically known as ____.
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50. Software stored in NVM is called ____.
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51. The ____, a newer packaging standard, is essentially a SIMM with independent electrical contacts on both sides of the module.
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52. The tendency of magnetically charged particles to lose their charge over time is called ____.
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53. The surface area allocated to store on a bit is called the ____.
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54. A(n) ____ is a ribbon of plastic with a coercible (usually metallic oxide) coating.
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55. A ____ consists of all tracks at an equivalent distance from the edge or spindle on all platter surfaces.
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56. A single disk sector usually holds ____ or 4096 bytes.
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57. Multiple hard drives can be enclosed in a single storage cabinet; this arrangement is referred to as a ____.
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58. Read/write circuitry uses ____ data to compensate for minor variations in rotation speed and other factors that might disturb the precise timing needed for reliable reading and writing.
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59. The time needed to move from one track to another is called ____, typically measured in milliseconds.
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60. The time the disk controller must wait for the right sector to rotate beneath the heads is called ____.
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61. ____ is the sum of average access delay and the time required to read a single sector.
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62. ____ is the time required to read the second of two adjacent sectors on the same track and platter.
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63. A disk with many program and data files scattered on it is said to be ____.
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64. A ____ reorganizes disk content so that a file’s contents are stored in sequential sectors, tracks, and platters.
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65. A ____ is a storage device that mimics the behavior of a magnetic disk drive but uses flash RAM or other NVM devices as the storage medium and read/write mechanism.
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66. Current SSDs use ____ as the storage medium.
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67. Modern SSDs use a technique called “____” to spread write operations around the storage medium, thus evening out the impact of destructive writes and extending the storage device’s useful life.
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68. Sony and Philips originally developed compact disc (CD) technology for storing and distributing music in the ____ format.
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69. In a CD, flat areas in the reflective layer that represent bit values are called “____.”
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70. In a CD, concave dents in the reflective layer that are used to represent bit values are called “____.”
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| Completion |
71. A storage device consists of a read/write mechanism and a(n) ____________________.
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72. A(n) ____________________ provides the interface between the storage device and system bus.
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73. A CPU with a 1 GHz clock rate needs a new instruction and supporting data every ____________________.
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74. ____________________ is the time required to perform one complete read or write operation.
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75. The term ____________________ describes the data transfer unit for magnetic disk and optical disc drives.
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76. ____________________ is the only widely used form of serial access storage.
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77. A(n) ____________________ device can access multiple storage locations simultaneously.
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78. Primary storage devices must closely match CPU speed and word size to avoid ____________________.
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79. Each refresh operation in DRAM is called a(n) ____________________.
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80. ____________________ is a read-ahead RAM that uses the same clock pulse as the system bus.
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81. ____________________ stores bit values by using two magnetic elements, one with fixed polarity and the other with polarity that changes when a bit is written.
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82. ____________________ RAM is the most common non-volatile RAM used today.
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83. ____________________ is the capability of a substance or magnetic storage medium to accept and hold a magnetic charge.
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84. The stored charge held within a bit of magnetic storage must be above the ____________________ for a read operation to be successful.
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85. For a two-dimensional storage medium like a disk platter, having the length and width of the area that stores one bit increases storage capacity by a factor of ____________________
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86. Magnetic disk media are flat, circular ____________________ with metallic coatings that are rotated beneath read/write heads.
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87. A(n) ____________________ is one concentric circle of a platter, or the surface area that passes under a read/write head when its position is fixed.
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88. In a magnetic disk drive, a(n) ____________________ is mounted on the end of an access arm for each platter surface.
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89. Average access time is computed under the assumption that two consecutive accesses are sent to ____________________ locations.
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90. Over time, file contents tend to become ____________________ in many nonsequential sectors.
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91. A disk drive’s data ____________________ rate is a summary performance number combining the physical aspects of data access with the electronic aspects of data transfer to the disk controller or system.
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92. The ____________________ data transfer rate is the fastest rate the drive can support.
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93. Optical storage devices store bit values as variations in ____________________.
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94. Current optical storage devices use a(n) ____________________ storage medium.
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95. In a magneto-optical drive, the laser polarity shift used in reading is known as the “____________________ effect.”
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| Essay |
96. List important characteristics among which storage devices and technologies vary.
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97. How is a storage device’s data transfer rate computed?
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98. Explain the two ways that storage device portability is typically implemented.
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99. What is an advantage of optical storage over magnetic storage?
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100. Describe phase-change optical discs.
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Original price was: $30.00.$20.00Current price is: $20.00.
Original price was: $30.00.$20.00Current price is: $20.00.
Original price was: $30.00.$20.00Current price is: $20.00.
Original price was: $30.00.$20.00Current price is: $20.00.
Original price was: $30.00.$20.00Current price is: $20.00.
Original price was: $30.00.$20.00Current price is: $20.00.
