DATABASE DESIGN USING NORMALIZATION QUIZ

Each answer below shows example data from a table. Which answer is an example of the general-purpose remarks column problem?

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

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

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Needing to using more complicated SQL in database applications is a(n) ________ of normalization.

disadvantage

either an advantage or disadvantage

advantage

neither an advantage nor disadvantage

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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, NULL, and Blue in the same column.

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.

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

second step.

fourth step.

third step.

first step.

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When building a database from an existing set of tables, we may safely assume that there are no multivalued dependencies in the data we are given.

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

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In all cases, normalization into BCNF is desirable.

True

False

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Denormalized tables are in BCNF.

False

True

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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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The phrase "SALE.CNumber must exist in CUSTOMER.CNumber" is a referential integrity constraint.

True

False

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