PHYSICAL DATABASE DESIGN QUIZ

A bitmap index is an index on columns from two or more tables that come from the same domain of values.

True

False

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A secondary key is which of the following?

Primary key

Nonunique key

Determines the tablespace required

Useful for denormalization decisions

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

True

False

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A field represents each component of a composite attribute.

False

True

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

True

False

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What is the best data type definition for Oracle when a field is alphanumeric and has a fixed length?

LONG

NUMBER

CHAR

VARCHAR2

TRUE ANSWER : ?
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If a denormalization situation exists with a many-to-many or associative 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 three relations.

All fields are stored in two relations.

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

False

True

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The three newest database architectures in use today are relational, multidimensional and hierarchical.

True

False

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When storage space is scarce and physical records cannot span pages, creating multiple physical records from one logical relation will minimize wasted storage space.

False

True

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