DATABASE DESIGN USING NORMALIZATION QUIZ

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

True

False

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

TRUE ANSWER : ?
YOUR ANSWER : ?

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

The missing values problem

The multivalue, multicolumn problem

The inconsistent values problem

The general-purpose remarks column problem

TRUE ANSWER : ?
YOUR ANSWER : ?

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

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

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.

TRUE ANSWER : ?
YOUR ANSWER : ?

We use the SQL construct COLUMNS(*) to determine the number and type of columns in a table.

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?

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

disadvantage

either an advantage or disadvantage

neither an advantage nor disadvantage

advantage

TRUE ANSWER : ?
YOUR ANSWER : ?

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 : ?

Most of the time, modification anomalies are serious enough that tables should be normalized into:

BCNF.

3NF.

1NF.

2NF.

TRUE ANSWER : ?
YOUR ANSWER : ?

Needing to assess the validity of assumed referential integrity constraints on foreign keys is a(n) ________ of normalization.

neither an advantage nor disadvantage

disadvantage

advantage

either an advantage or disadvantage

TRUE ANSWER : ?
YOUR ANSWER : ?

We have normalized a table into BCNF if all candidate keys are determinants.

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?