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Exam 5: Data Storage Technology

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Question 1

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____________________ is the only widely used form of serial access storage.

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Electrical current can generate a magnetic field but a magnetic field cannot generate electricity.

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Block size is normally stated in bytes and is generally the same between storage devices, especially in a single storage device.

____________________ is the capability of a substance or magnetic storage medium to accept and hold a magnetic charge.

A storage device or medium is ____ if it can't hold data reliably for long periods.

The CPU moves data and instructions continually between registers and primary storage.

Secondary storage is generally expensive compared with primary storage.

Magnetic tape and disk are considered volatile storage media.

Describe phase-change optical discs.

The time needed to move from one track to another is called ____, typically measured in milliseconds.

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.

A ____ is a CPU cycle spent waiting for access to an instruction or data.

The tendency of magnetically charged particles to lose their charge over time is called ____.

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.

​A storage device consists of a read/write mechanism and a(n) ____________________.

The stored charge held within a bit of magnetic storage must be above the ____________________ for a read operation to be successful.

The physical structure of a storage device's read/write mechanism and storage medium determines the ways in which data can be accessed.

Volatility is a matter of degree and conditions.

Access times for secondary storage devices are typically expressed in ____ or microseconds.

Over time, file contents tend to become ____________________ in many nonsequential sectors.