Chapter 1
Discuss why alternative IS development approaches have evolved, and provide an overview of a couple of these methodologies.
Diverse IS development approaches have evolved over the years to include the SDLC and RAD models. The SDLC often takes a long time to implement, so the RAD method was created. Rapid Application Design focuses on the repeating of analysis, design, and implementation steps. One of the most common types is prototyping which is an iterative process. The SDLC model is a conceptual framework describing all activities in a software development project.
All projects move from the planning-enterprise modeling step to the planning-conceptual data modeling step of the systems development life cycle
False
Data redundancy is used to establish relationships between data but is never used to improve database performance
False
In 1998, ANSI/SPARC published an import document describing the three-schema architecture.
False
Systems analysts work directly with both management and users to analyze the business situation and develop detailed project specifications.
False
The physical structure and storage organization of the database is decided upon during the implementation phase of the systems development life cycle
False
A data warehouse contains summarized and historical information.
True
A person is an example of an entity.
True
Database architects establish standards for data in business units
True
Information is processed data.
True
Metadata are data that describe the properties of other data.
True
The user interface includes languages, menus, and other facilities by which users interact with various system components.
True
A well-structured database establishes the entities between relationships in order to derive the desired information.
false
Organizations that utilize the file processing approach spend only 20 percent of development time on maintenance.
false
The SDLC phase in which database processing programs are created is the ________ phase. a) planning b)design c)analysis d)implementation
implementation
A database is an organized collection of ________ related data logically physically loosely badly
logically
Data that describe the properties of other data are: relationships logical physical metadata
metadata
Relational databases establish the relationships between entities by means of common fields included in a file called a(n) entity relationship relation association
relation
Determining the structure of data and the relationships between data elements either right before or at the time of use of the data is called a) tables on write. b) schema on write. c) on demand paging. d) caching.
schema on write
A physical schema contains the specifications for how data from a conceptual schema are stored in a computer's secondary memory
true
An extranet uses Internet protocols to establish limited access to company data by the company's customers and suppliers.
true
File processing systems have been replaced by database systems in most critical business applications today.
true
The most common way to support a group of individuals who work together on a project or group of similar projects is with a multi-tier client/server database.
true
The systems development life cycle is the traditional methodology used to develop, maintain, and replace information systems.
true
Languages, menus, and other facilities by which users interact with the database are collectively called a(n client user Interface icon Development environment
user interface
