database-design-using-normalization database question and answers -Page 3

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Database Design Using Normalization problems

1. In all cases, normalization into BCNF is desirable.
Options
A. True
B. False

Correct Answer: False

2. Denormalized tables are in BCNF.
Options
A. True
B. False

Correct Answer: False

3. Normalization requires programmers to write more complex SQL.
Options
A. True
B. False

Correct Answer: True

4. When building a database from an existing set of tables, we may safely assume that referential integrity constraints have been enforced on the data we are given.
Options
A. True
B. False

Correct Answer: False

5. One common design problem when designing a database from existing data is the use of a general-purpose remarks column in the received data.
Options
A. True
B. False

Correct Answer: True

6. Most of the time, modification anomalies cause problems that are severe enough that a table should be normalized into BCNF.
Options
A. True
B. False

Correct Answer: True

7. We use the SQL construct COUNT(*) to count the number of rows in a table.
Options
A. True
B. False

Correct Answer: True

8. 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.
Options
A. True
B. False

Correct Answer: False

9. One common design problem when designing a database from existing data is the presence of missing values, called blank values, in received data.
Options
A. True
B. False

Correct Answer: False

10. We use the SQL construct COLUMNS(*) to determine the number and type of columns in a table.
Options
A. True
B. False

Correct Answer: False

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