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Physical Database Design

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

True
False

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Physical Database Design
Sequential retrieval on a primary key for sequential file storage has which of the following features?

Very fast
Impractical
Slow
Moderately fast

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Physical Database Design
Selecting a data type involves which of the following?

Maximize storage space
Improve data integrity
All of these
Represent most values

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Physical Database Design
Which of the following improves a query's processing time?

Query one query within another.
Write complex queries.
Use compatible data types.
Combine a table with itself.

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

NUMBER
VARCHAR2
CHAR
LONG

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