Database Design Using Normalization(Database ) Questions and Answers

Question 1. Needing to using more complicated SQL in database applications is a(n) ________ of normalization.
  1.    advantage
  2.    disadvantage
  3.    either an advantage or disadvantage
  4.    neither an advantage nor disadvantage
Explanation:-
Answer: Option B. -> disadvantage
Question 2. Multivalued dependencies should ________ be eliminated.
  1.    always
  2.    commonly
  3.    seldom
  4.    never
Explanation:-
Answer: Option A. -> always
Question 3. Eliminating modification anomalies is a(n) ________ of normalization.
  1.    advantage
  2.    disadvantage
  3.    either an advantage or disadvantage
  4.    neither an advantage nor disadvantage
Explanation:-
Answer: Option A. -> advantage
Question 4. Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems?
  1.    The multivalue, multicolumn problem
  2.    The inconsistent values problem
  3.    The missing values problem
  4.    The general-purpose remarks column problem
Explanation:-
Answer: Option B. -> The inconsistent values problem
Question 5. 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:
  1.    first step.
  2.    second step.
  3.    third step.
  4.    fourth step.
Explanation:-
Answer: Option C. -> third step.
Question 6. 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.
  1.    True
  2.    False
Explanation:-
Answer: Option B. -> False
Question 7. We use the SQL construct COLUMNS(*) to determine the number and type of columns in a table.
  1.    True
  2.    False
Explanation:-
Answer: Option B. -> False
Question 8. We have normalized a table into BCNF if all candidate keys are determinants.
  1.    True
  2.    False
Explanation:-
Answer: Option B. -> False
Question 9. Most of the time, modification anomalies cause problems that are severe enough that a table should be normalized into BCNF.
  1.    True
  2.    False
Explanation:-
Answer: Option A. -> True
Question 10. When building a database from an existing set of tables, we still need to consider normalization principles.
  1.    True
  2.    False
Explanation:-
Answer: Option A. -> True
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