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Exam 5: Data Storage Technology

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Question 41

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Programs usually access instructions and data items ____.

A) randomly
B) dynamically
C) repeatedly
D) sequentially

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Question 42

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Memory devices comprised of semiconductors and other forms of RAM with long-term or permanent data retention are generically known as ____.

A) volatile memory
B) tertiary storage
C) nonvolatile memory
D) persistent memory

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Question 43

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The time the disk controller must wait for the right sector to rotate beneath the heads is called ____.

Magnetic disk media are flat, circular ____________________ with metallic coatings that are rotated beneath read/write heads.

​A storage device consists of a read/write mechanism and a storage medium.

The write operation for recordable discs is destructive, so recordable disc formats can be written only one time.

The ____________________ data transfer rate is the fastest rate the drive can support.

A CPU with a 1 GHz clock rate needs a new instruction and supporting data every ____________________.

​____ is a read-ahead RAM that uses the same clock pulse as the system bus.

​A(n) ____________________ device can access multiple storage locations simultaneously.

​____________________ stores bit values by using two magnetic elements, one with fixed polarity and the other with polarity that changes when a bit is written.

​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portions because the assumption that an average access requires moving the read/write head over half the tracks is no longer valid.

HTH switching time is the most important component of access time.

____ in the CPU are storage locations for instructions and data.

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.

Rewritable DVDs use a single standard adopted by the entire industry.

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.

Software stored in NVM is called ____.

Explain the two ways that storage device portability is typically implemented.

The term ____________________ describes the data transfer unit for magnetic disk and optical disc drives.