DATABASE DESIGN USING NORMALIZATION QUIZ

Multivalued dependencies create harmless anomalies that should be noted, but do not always need to be eliminated.

True

False

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When assessing the table structure of an acquired set of tables with data, determining foreign keys is (part of) the:

first step.

third step.

fourth step.

second step.

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One common design problem when designing a database from existing data is the presence of missing values, called blank values, in received data.

True

False

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Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems?

The multivalue, multicolumn problem

The missing values problem

The inconsistent values problem

The general-purpose remarks column problem

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Creating a read-only database is a task that is ________ assigned to beginning database professionals.

never

commonly

always

seldom

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When assessing the table structure of an acquired set of tables with data, accessing the validity of possible referential integrity constraints on foreign keys is (part of) the:

first step.

third step.

second step.

fourth step.

TRUE ANSWER : ?
YOUR ANSWER : ?

One common design problem when designing a database from existing data is the use of a single cell in one column to store multiple values of an attribute.

False

True

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Each answer below shows example data from a table. Which answer is an example of the missing values problem?

Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.

Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.

One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.

Three rows have the values Brown, NULL, and Blue in the same column.

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Proper normalization eliminates duplicated data.

False

True

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One common design problem when designing a database from existing data is the use of a general-purpose remarks column in the received data.

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?