Database Design Using Normalization

Q1: For a number of reasons, normalizations is not often an advantage for a(n) ________ database.

A read-only

B updateable

C either a read-only or an updateable

D None of the above is correct.

Q2: Most of the time, modification anomalies are serious enough that tables should be normalized into:

A 1NF

B 2NF

C 3NF

D BCNF.

Q3: Read-only databases are ________ updated.

A always

B commonly

C seldom

D never

Q4: 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:

A first step.

B second step.

C third step.

D fourth step.

Q5: Each answer below shows example data from a table. Which answer is an example of the multivalue, multicolumn problem?

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

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

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

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

Q6: Normalization ________ data duplication.

A eliminates

B reduces

C increases

D maximizes

Q7: Creating a read-only database is a task that is ________ assigned to beginning database professionals.

A always

B commonly

C seldom

D never

Q8: Needing to using more complicated SQL in database applications is a(n) ________ of normalization.

A advantage

B disadvantage

C either an advantage or disadvantage

D neither an advantage nor disadvantage

Q9: When assessing the table structure of an acquired set of tables with data, determining primary keys is (part of) the:

A first step.

B second step.

C third step.

D fourth step.

Q10: Eliminating modification anomalies is a(n) ________ of normalization.

A advantage

B disadvantage

C either an advantage or disadvantage

D neither an advantage nor disadvantage

Q11: If a table has been normalized so that all determinants are candidate keys, then that table is in:

A 1NF

B 2NF

C 3NF

D BCNF.

Q12: Multivalued dependencies should ________ be eliminated.

A always

B commonly

C seldom

D never

Q13: Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems?

A The multivalue, multicolumn problem

B The inconsistent values problem

C The missing values problem

D The general-purpose remarks column problem

Q14: Needing to assess the validity of assumed referential integrity constraints on foreign keys is a(n) ________ of normalization.

A advantage

B disadvantage

C either an advantage or disadvantage

D neither an advantage nor disadvantage

Q15: When assessing the table structure of an acquired set of tables with data, counting the number of table rows is (part of) the:

A first step.

B second step.

C third step.

D fourth step.

Q16: When assessing the table structure of an acquired set of tables with data, determining functional dependencies is (part of) the:

A first step.

B second step.

C third step.

D fourth step.

Q17: Each answer below shows example data from a table. Which answer is an example of the general-purpose remarks column problem?

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

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

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

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

Q18: Each answer below shows example data from a table. Which answer is an example of the inconsistent values problem?

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

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

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

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

Q19: Each answer below shows example data from a table. Which answer is an example of the missing values problem?

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

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

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

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

Q20: When assessing the table structure of an acquired set of tables with data, determining foreign keys is (part of) the:

A first step.

B second step.

C third step.

D fourth step.


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