MODELING DATA IN THE ORGANIZATION QUIZ

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

True

False

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The fastest read/write time and most efficient data storage of any disk array type is:

RAID-2

RAID-1

RAID-0

RAID-3

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In general, larger block sizes are used for online transaction processing applications and smaller block sizes are used for databases with a decision support or data warehousing system.

True

False

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Which of the following are integrity controls that a DBMS may support?

Assume a default value in a field unless a user enters a value for that field.

All of these

Limit the use of null values in some fields.

Limit the set of permissible values that a field may assume.

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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.

True

False

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Some advantages of partitioning include: efficiency, security, and load balancing.

False

True

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An extent is a contiguous section of disk storage space.

False

True

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It is usually not very important to design the physical database to minimize the time required by users to interact with the information systems.

False

True

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

VARCHAR2

LONG

CHAR

NUMBER

TRUE ANSWER : ?
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