Database Design Using Normalization MCQs

Question 1

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

Accepted Answer

BCNF.

Answer

1NF.

Answer

2NF.

Answer

3NF.

Question 2

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

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 3

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

Accepted Answer

second step.

Answer

first step.

Answer

third step.

Answer

fourth step.

Question 4

Each answer below shows example data from a table. Which answer is an example of the multivalue, multicolumn problem?

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 5

When assessing the table structure of an acquired set of tables with data, counting the number of table rows is (part of) the:

Accepted Answer

first step.

Answer

second step.

Answer

third step.

Answer

fourth step.

Question 6

If a table has been normalized so that all determinants are candidate keys, then that table is in:

Accepted Answer

BCNF.

Answer

1NF.

Answer

2NF.

Answer

3NF.

Question 7

Read-only databases are ________ updated.

Accepted Answer

never

Answer

always

Answer

commonly

Answer

seldom

Question 8

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

Accepted Answer

neither an advantage nor disadvantage

Answer

advantage

Answer

disadvantage

Answer

either an advantage or disadvantage

Question 9

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

Accepted Answer

second step.

Answer

first step.

Answer

third step.

Answer

fourth step.