Database Design Using Normalization(Engineering > Computer Science And Engineering > Database System ) Questions and Answers
Question 1. Needing to using more complicated SQL in database applications is a(n) ________ of normalization.
advantage
either an advantage or disadvantage
neither an advantage nor disadvantage
disadvantage
Explanation:-
Answer: Option D. -> disadvantage
Question 2. 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:
third step.
first step.
fourth step.
second step.
Explanation:-
Answer: Option A. -> third step.
Question 3. Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems?
The general-purpose remarks column problem
The inconsistent values problem
The missing values problem
The multivalue, multicolumn problem
Explanation:-
Answer: Option B. -> The inconsistent values problem
Question 4. Multivalued dependencies should ________ be eliminated.
seldom
commonly
always
never
Explanation:-
Answer: Option C. -> always
Question 5. Eliminating modification anomalies is a(n) ________ of normalization.
disadvantage
either an advantage or disadvantage
neither an advantage nor disadvantage
advantage
Explanation:-
Answer: Option D. -> advantage
Question 6. When assessing the table structure of an acquired set of tables with data, determining foreign keys is (part of) the:
second step.
third step.
fourth step.
first step.
Explanation:-
Answer: Option A. -> second step.
Question 7. Creating a read-only database is a task that is ________ assigned to beginning database professionals.
never
always
commonly
seldom
Explanation:-
Answer: Option C. -> commonly
Question 8. For a number of reasons, normalizations is not often an advantage for a(n) ________ database.
either a read-only or an updateable
read-only
None of these
updateable
Explanation:-
Answer: Option B. -> read-only
Question 9. 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.
Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
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.
Explanation:-
Answer: Option C. -> One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.
Question 10. Most of the time, modification anomalies are serious enough that tables should be normalized into: