11
Each answer below shows example data from a table. Which answer is an example of the missing values problem?
A)
Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
B)
Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
C)
Three rows have the values Brown, NULL, and Blue in the same column.
D)
One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.
Answer & Solution
Answer: Option
C
12
When assessing the table structure of an acquired set of tables with data, determining functional dependencies is (part of) the:
A)
first step.
B)
second step.
C)
third step.
D)
fourth step.
Answer & Solution
Answer: Option
B
13
Each answer below shows example data from a table. Which answer is an example of the multivalue, multicolumn problem?
A)
Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
B)
Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
C)
Three rows have the values Brown, NULL, and Blue in the same column.
D)
One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.
Answer & Solution
Answer: Option
A
14
When assessing the table structure of an acquired set of tables with data, counting the number of table rows is (part of) the:
A)
first step.
B)
second step.
C)
third step.
D)
fourth step.
Answer & Solution
Answer: Option
A
15
If a table has been normalized so that all determinants are candidate keys, then that table is in:
A)
1NF.
B)
2NF.
C)
3NF.
D)
BCNF.
Answer & Solution
Answer: Option
D
16
Read-only databases are ________ updated.
A)
always
B)
commonly
C)
seldom
D)
never
Answer & Solution
Answer: Option
D
17
Needing to assess the validity of assumed referential integrity constraints on foreign keys is a(n) ________ of normalization.
A)
advantage
B)
disadvantage
C)
either an advantage or disadvantage
D)
neither an advantage nor disadvantage
Answer & Solution
Answer: Option
D
18
When assessing the table structure of an acquired set of tables with data, determining primary keys is (part of) the:
A)
first step.
B)
second step.
C)
third step.
D)
fourth step.
Answer & Solution
Answer: Option
B
19
Normalization ________ data duplication.
A)
eliminates
B)
reduces
C)
increases
D)
maximizes
Answer & Solution
Answer: Option
A
20
Each answer below shows example data from a table. Which answer is an example of the inconsistent values problem?
A)
Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
B)
Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
C)
Three rows have the values Brown, NULL, and Blue in the same column.
D)
One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.
Answer & Solution
Answer: Option
B
