A(n) ____’s main function is to help you understand the complexities of the real-world environment. |
c. model |
A(n) ____ represents a particular type of object in the real world. |
b. entity |
A(n) ____ is anything about which data are to be collected and stored. |
b. entity |
A(n) ____ is the equivalent of a field in a file system. |
a. attribute |
A(n) ____ is bidirectional. |
c. relationship |
A(n) ____ is a restriction placed on the data. |
d. constraint |
____ are important because they help to ensure data integrity. |
d. Constraints |
____ are normally expressed in the form of rules. |
d. Constraints |
Students and classes have a ____ relationship. |
d. many-to-many |
Business rules are derived from ____. |
a. a de-tailed de-scrip-tion of an or-gani-za-tion’s oper-ations |
Which of the following is true of business rules? |
c. They can serve as a commu-nica-tion tool be-tween the users and de-sign-ers. |
A noun in a business rule translates to a(n) ____ in the data model. |
a. entity |
A verb associating two nouns in a business rule translates to a(n) ____ in the data model. |
c. relationship |
The hierarchical data model was developed in the ____. |
a. 1960s |
The object-oriented data model was developed in the ____. |
c. 1980s |
VMS/VSAM is an example of a(n) ____. |
b. file system data model |
Oracle 11g is an example of a(n) ____. |
d. XML/Hybrid data model |
MySQL is an example of a(n) ____. |
c. relational data model |
In the ____ model, the basic logical structure is represented as an upside-down tree. |
a. hierarchical |
In the ____ model, each parent can have many children, but each child has only one parent. |
a. hierarchical |
The relational data model was developed in the ____. |
b. 1970s |
In the ____ model, the user perceives the database as a collection of records in 1:M relationships, where each record can have more than one parent. |
b. network |
A(n) ____ enables a database administrator to define schema components. |
b. data definition language (DDL) |
The ____ model was developed to allow designers to use a graphical tool to examine structures rather than describing them with text. |
d. entity relationship |
The ____ model uses the term connectivity to label the relationship types. |
d. entity relationship |
The ____ data model is said to be a semantic data model. |
c. object-oriented |
The ____ data model uses the concept of inheritance. |
c. object-oriented |
One of the limitations of the ____ model is that there is a lack of standards. |
a. hierarchical |
The ____ model is the end users’ view of the data environment. |
b. external |
A(n) ____ model represents a global view of the database as viewed by the entire organization. |
b. conceptual |
Database Final chp. 2 M-C
Share This
Unfinished tasks keep piling up?
Let us complete them for you. Quickly and professionally.
Check Price