PHYSICAL DATABASE DESIGN QUIZ

Two basic constructs to link one piece of data with another piece of data: sequential storage and pointers.

True

False

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Denormalization and clustering can work well to minimize data access time for small records.

False

True

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Hashing algorithm converts a primary key value into a record address.

False

True

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Data-volume and frequency-of-use statistics are not critical inputs to the physical database design process.

True

False

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A rule of thumb for choosing indexes for a relational database includes which of the following?

Be careful indexing attributes that have null values.

Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries.

Indexes are more useful on smaller tables.

Do not specify a unique index for the primary key of each table.

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The primary goal of physical database design is data processing efficiency.

False

True

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If a denormalization situation exists with a one-to-one binary relationship, which of the following is true?

All fields are stored in one relation.

All fields are stored in four relations.

All fields are stored in two relations.

All fields are stored in three relations.

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Distributing the columns of a table into several separate physical records is known as horizontal partitioning.

False

True

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A pointer is a detailed coding scheme recognized by system software for representing organizational data.

False

True

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An extent is a contiguous section of disk storage space.

False

True

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