Questions and answers for exam Preparation

MCQs

Total Questions : 54 | Page 4 of 6 pages

Question 31. Eliminating modification anomalies is a(n) ________ of normalization.

advantage
disadvantage
either an advantage or disadvantage
neither an advantage nor disadvantage

Discuss Question

Answer: Option A. -> advantage

Question 32. 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:

first step.
second step.
third step.
fourth step.

Discuss Question

Answer: Option C. -> third step.

Question 33. Creating a read-only database is a task that is ________ assigned to beginning database professionals.

always
commonly
seldom
never

Discuss Question

Answer: Option B. -> commonly

Question 34. Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems?

The multivalue, multicolumn problem
The inconsistent values problem
The missing values problem
The general-purpose remarks column problem

Discuss Question

Answer: Option B. -> The inconsistent values problem

Question 35. When assessing the table structure of an acquired set of tables with data, determining foreign keys is (part of) the:

first step.
second step.
third step.
fourth step.

Discuss Question

Answer: Option B. -> second step.

Question 36. Each answer below shows example data from a table. Which answer is an example of the general-purpose remarks column problem?

Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
Three rows have the values Brown, NULL, and Blue in the same column.
One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.

Discuss Question

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

Question 37. . When assessing the table structure of an acquired set of tables with data, determining functional dependencies is (part of) the:

first step.
second step.
third step.
fourth step.

Discuss Question

Answer: Option B. -> second step.

Question 38. . Each answer below shows example data from a table. Which answer is an example of the multivalue, multicolumn problem?

Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
Three rows have the values Brown, NULL, and Blue in the same column.
One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.

Discuss Question

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

Question 39. . Each answer below shows example data from a table. Which answer is an example of the missing values problem?

Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
Three rows have the values Brown, NULL, and Blue in the same column.
One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.

Discuss Question

Answer: Option C. -> Three rows have the values Brown, NULL, and Blue in the same column.

Question 40. . When assessing the table structure of an acquired set of tables with data, counting the number of table rows is (part of) the: