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MCQs

Total Questions : 40 | Page 4 of 4 pages
Question 31. The design guidelines and priorities for read-only databases are different because read-only databases are never updated.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 32. Multivalued dependencies create harmless anomalies that should be noted, but do not always need to be eliminated.
  1.    False
  2.    True
 Discuss Question
Answer: Option A. -> False
Question 33. When you are given a set of tables and asked to create a database to store their data, the first step is to create the new database.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 34. We use the SQL construct COUNT(*) to count the number of rows in a table.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 35. The phrase "SALE.CNumber must exist in CUSTOMER.CNumber" is a referential integrity constraint.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 36. One common design problem when designing a database from existing data is the use of a general-purpose remarks column in the received data.
  1.    False
  2.    True
 Discuss Question
Answer: Option B. -> True
Question 37. One common design problem when designing a database from existing data is the presence of missing values, called blank values, in received data.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 38. Normalization requires programmers to write more complex SQL.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 39. One common design problem when designing a database from existing data is the presence of inconsistent values in the received data.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 40. When building a database from an existing set of tables, we may safely assume that there are no multivalued dependencies in the data we are given.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False

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