Q.1
One common design problem when designing a database from existing data is the use of a general-purpose remarks column in the received data.
Q.2
One common design problem when designing a database from existing data is the presence of missing values, called blank values, in received data.
Q.3
Normalization requires programmers to write more complex SQL.
Q.4
One common design problem when designing a database from existing data is the presence of inconsistent values in the received data.
Q.5
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.
Q.6
The design guidelines and priorities for read-only databases are different because read-only databases are never updated.
Q.7
The phrase "SALE.CNumber must exist in CUSTOMER.CNumber" is a referential integrity constraint.
Q.8
We use the SQL construct COUNT(*) to count the number of rows in a table.
Q.9
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.
Q.10
In all cases, normalization into BCNF is desirable.
Q.11
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.
Q.12
Multivalued dependencies create harmless anomalies that should be noted, but do not always need to be eliminated.
Q.13
Denormalized tables are in BCNF.
Q.14
We can eliminate modification anomalies with proper normalization that results in tables in BCNF.
Q.15
Proper normalization eliminates duplicated data.
Q.16
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.
Q.17
Most of the time, modification anomalies cause problems that are severe enough that a table should be normalized into BCNF.
Q.18
Read-only databases are ________ updated.
Q.19
Needing to assess the validity of assumed referential integrity constraints on foreign keys is a(n) ________ of normalization.
Q.20
Each answer below shows example data from a table. Which answer is an example of the missing values problem?
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