32 + Mcqs in Database Design Using Normalization Page 1 McqOptions

1.	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.%!
A.	True
B.	False
Answer» C.

Discussion

2.	Multivalued dependencies create harmless anomalies that should be noted, but do not always need to be eliminated.%!
A.	True
B.	False
Answer» C.

Discussion

3.	Proper normalization eliminates duplicated data.%!
A.	True
B.	False
Answer» C.

Discussion

4.	We use the SQL construct COLUMNS(*) to determine the number and type of columns in a table.%!
A.	True
B.	False
Answer» C.

Discussion

5.	One common design problem when designing a database from existing data is the presence of inconsistent values in the received data.%!
A.	True
B.	False
Answer» B. False

Discussion

6.	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.%!
A.	True
B.	False
Answer» C.

Discussion

7.	We can eliminate modification anomalies with proper normalization that results in tables in BCNF.%!
A.	True
B.	False
Answer» B. False

Discussion

8.	We have normalized a table into BCNF if all candidate keys are determinants.%!
A.	True
B.	False
Answer» C.

Discussion

9.	Normalization requires programmers to write more complex SQL.%!
A.	True
B.	False
Answer» B. False

Discussion

10.	We use the SQL construct COUNT(*) to count the number of rows in a table.%!
A.	True
B.	False
Answer» B. False

Discussion

11.	Denormalized tables are in BCNF.%!
A.	True
B.	False
Answer» C.

Discussion

12.	When building a database from an existing set of tables, we still need to consider normalization principles.%!
A.	True
B.	False
Answer» B. False

Discussion

13.	One common design problem when designing a database from existing data is the presence of missing values, called blank values, in received data.%!
A.	True
B.	False
Answer» C.

Discussion

14.	The phrase "SALE.CNumber must exist in CUSTOMER.CNumber" is a referential integrity constraint.%!
A.	True
B.	False
Answer» B. False

Discussion

15.	In all cases, normalization into BCNF is desirable.%!
A.	True
B.	False
Answer» C.

Discussion

16.	Most of the time, modification anomalies cause problems that are severe enough that a table should be normalized into BCNF.%!
A.	True
B.	False
Answer» B. False

Discussion

17.	One common design problem when designing a database from existing data is the use of a general-purpose remarks column in the received data.%!
A.	True
B.	False
Answer» B. False

Discussion

18.	The design guidelines and priorities for read-only databases are different because read-only databases are never updated.%!
A.	True
B.	False
Answer» B. False

Discussion

19.	One common design problem when designing a database from existing data is the use of a single cell in one column to store multiple values of an attribute.%!
A.	True
B.	False
Answer» C.

Discussion

20.	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.%!
A.	True
B.	False
Answer» C.

Discussion

21.	/_Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems??
A.	The multivalue, multicolumn problem
B.	The inconsistent values problem
C.	The missing values problem
D.	The general-purpose remarks column problem
Answer» C. The missing values problem

Discussion

22.	/_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» C. Three rows have the values Brown, NULL, and Blue in the same column.

Discussion

23.	/_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» E.

Discussion

24.	/_Most of the time, modification anomalies are serious enough that tables should be normalized into:?
A.	1NF.
B.	2NF.
C.	3NF.
D.	BCNF.
Answer» E.

Discussion

25.	_ 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:$?
A.	first step.
B.	second step.
C.	third step.
D.	fourth step.
Answer» D. fourth step.

Discussion

26.	_ Normalization ________ data duplication.$?
A.	eliminates
B.	reduces
C.	increases
D.	maximizes
Answer» B. reduces

Discussion

27.	_ 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» B. second step.

Discussion

28.	_ For a number of reasons, normalizations is not often an advantage for a(n) ________ database.$?
A.	read-only
B.	updateable
C.	either a read-only or an updateable
D.	None of the above is correct
Answer» B. updateable

Discussion

29.	_Multivalued dependencies should ________ be eliminated.$?
A.	always
B.	commonly
C.	seldom
D.	never
Answer» B. commonly

Discussion

30.	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» C. third step.

Discussion

31.	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» B. Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.

Discussion

32.	Each answer below shows example data from a table. Which answer is an example of the general-purpose remarks column 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» E.

Discussion

Explore topic-wise MCQs in Database.

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.%!

Multivalued dependencies create harmless anomalies that should be noted, but do not always need to be eliminated.%!

Proper normalization eliminates duplicated data.%!

We use the SQL construct COLUMNS(*) to determine the number and type of columns in a table.%!

One common design problem when designing a database from existing data is the presence of inconsistent values in the received data.%!

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.%!

We can eliminate modification anomalies with proper normalization that results in tables in BCNF.%!

We have normalized a table into BCNF if all candidate keys are determinants.%!

Normalization requires programmers to write more complex SQL.%!

We use the SQL construct COUNT(*) to count the number of rows in a table.%!

Denormalized tables are in BCNF.%!

When building a database from an existing set of tables, we still need to consider normalization principles.%!

One common design problem when designing a database from existing data is the presence of missing values, called blank values, in received data.%!

The phrase "SALE.CNumber must exist in CUSTOMER.CNumber" is a referential integrity constraint.%!

In all cases, normalization into BCNF is desirable.%!

Most of the time, modification anomalies cause problems that are severe enough that a table should be normalized into BCNF.%!

One common design problem when designing a database from existing data is the use of a general-purpose remarks column in the received data.%!

The design guidelines and priorities for read-only databases are different because read-only databases are never updated.%!

One common design problem when designing a database from existing data is the use of a single cell in one column to store multiple values of an attribute.%!

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.%!

*/*_Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems??

*/*_Each answer below shows example data from a table. Which answer is an example of the inconsistent values problem??

*/*_If a table has been normalized so that all determinants are candidate keys, then that table is in:?

*/*_Most of the time, modification anomalies are serious enough that tables should be normalized into:?

_ 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:$?

_ Normalization ________ data duplication.$?

_ When assessing the table structure of an acquired set of tables with data, counting the number of table rows is (part of) the:$?

_ For a number of reasons, normalizations is not often an advantage for a(n) ________ database.$?

_Multivalued dependencies should ________ be eliminated.$?

When assessing the table structure of an acquired set of tables with data, determining primary keys is (part of) the:$?

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

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

/_Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems??

/_Each answer below shows example data from a table. Which answer is an example of the inconsistent values problem??

/_If a table has been normalized so that all determinants are candidate keys, then that table is in:?

/_Most of the time, modification anomalies are serious enough that tables should be normalized into:?