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MCQs

Total Questions : 40 | Page 1 of 4 pages
Question 1. Needing to using more complicated SQL in database applications is a(n) ________ of normalization.
  1.    advantage
  2.    either an advantage or disadvantage
  3.    neither an advantage nor disadvantage
  4.    disadvantage
 Discuss Question
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:
  1.    third step.
  2.    first step.
  3.    fourth step.
  4.    second step.
 Discuss Question
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?
  1.    The general-purpose remarks column problem
  2.    The inconsistent values problem
  3.    The missing values problem
  4.    The multivalue, multicolumn problem
 Discuss Question
Answer: Option B. -> The inconsistent values problem
Question 4. Multivalued dependencies should ________ be eliminated.
  1.    seldom
  2.    commonly
  3.    always
  4.    never
 Discuss Question
Answer: Option C. -> always
Question 5. Eliminating modification anomalies is a(n) ________ of normalization.
  1.    disadvantage
  2.    either an advantage or disadvantage
  3.    neither an advantage nor disadvantage
  4.    advantage
 Discuss Question
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:
  1.    second step.
  2.    third step.
  3.    fourth step.
  4.    first step.
 Discuss Question
Answer: Option A. -> second step.
Question 7. Creating a read-only database is a task that is ________ assigned to beginning database professionals.
  1.    never
  2.    always
  3.    commonly
  4.    seldom
 Discuss Question
Answer: Option C. -> commonly
Question 8. For a number of reasons, normalizations is not often an advantage for a(n) ________ database.
  1.    either a read-only or an updateable
  2.    read-only
  3.    None of these
  4.    updateable
 Discuss Question
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?
  1.    Three rows have the values Brown, NULL, and Blue in the same column.
  2.    Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
  3.    One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.
  4.    Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
 Discuss Question
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:
  1.    3NF.
  2.    BCNF.
  3.    1NF.
  4.    2NF.
 Discuss Question
Answer: Option B. -> BCNF.

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