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QuestionAnswer
During the implementation phase of developing a database system, the data model is transformed into a database design. FALSE
) When developing a database system, the database is constructed during the implementation phase. TRUE
During the design phase of developing a database system, the users are asked about the need for changes to existing forms and reports. FALSE
A use case is a description of the way a user will employ the features and functions of the new system. TRUE
Use cases can be used to validate the data model, design, and implementation. TRUE
System requirements as documented by use cases, business rules, forms, reports, and queries are sufficient to design the database without using a formal data model. FALSE
The PRODUCT entity instance is the collection of all PRODUCT entity classes. FALSE
An entity class is described by the structure of the entities in that class. True
10) There is usually only one instance of an entity in an entity class. FALSE
11) The E-R Model assumes that all instances of a given entity class have the same attributes. TRUE
12) An entity identifier can be either unique or nonunique. TRUE
13) The number of entity classes involved in a relationship is the cardinality of the relationship. FALSE
14) It is possible for an entity to have a relationship to itself. TRUE
15) Maximum cardinality indicates whether or not an instance of one entity class must be related to at least one instance of another entity class. FALSE
16) One type of strong entity is the ID-dependent entity. FALSE
17) In crow's foot E-R notation, the crow's foot indicates a maximum cardinality of one. FALSE
18) In crow's foot E-R notation, a circle indicates a minimum cardinality of zero. TRUE
19) In crow's foot E-R notation, the hash mark indicates both a minimum cardinality of one and a maximum cardinality of one. TRUE
20) Subtype entities may be either exclusive or inclusive. TRUE
21) Microsoft Access can be used to build a prototype database, which allows users to validate the data model by demonstrating the consequences of data modeling decisions. Answer: TRUE
22) Microsoft Access wizards allow easy mock-ups of forms and reports for prototyping. Answer: TRUE
23) Microsoft Access is only used to prototype databases where Access itself will be the final DBMS. FALSE
24) Microsoft Access database files can be easily copied to create multiple copies of a database. TRUE
25) Microsoft Access uses banded form and report editors. TRUE
26) Which of the following is not a stage in the development of a database system? A) Requirements B) Validation C) Design D) Implementation E) All of the above are stages in the development of a database system. Answer: B
27) The representation of the content, relationships, and constraints of the data needed to support the system requirements is the: A) relation design. B) implementation. C) data model. D) data view. E) application program. Answer: C
28) Which of the following activities is not performed during the implementation phase of developing a database system? A) Filling the database with data B) Transforming the data model into a database design C) Writing application programs D) Creating Answer: B
29) Which of the following is not a source for user requirements during the requirements stage of developing a database system? A) Business rules B) User interviews C) Forms D) Use cases E) All of the above are sources for user requirements Answer: E
30) Which of the following would not be contained in a use case? A) Inputs provided to the system to perform a task B) A description of a task the user wants to perform C) A prototype of the system performing a given task D) Outputs generated by the s Answer: C
Created by: wywxmhuaa
 

 



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