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ISDS 406 Ch questions wit complete solutions and answers certified 2024
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ISDS 406 Ch questions wit complete solutions and answers certified 2024
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ISDS 406 Ch. 5Definition of process model and what it is used to document - correct answer
✔- Process model- Is a graphical way of representing how a business system
should operate.
-It illustrates the processes or activities that are performed and how data
move among them.
-Can be used to document the current system (as-is system) or the new
system being developed (to-be system) whether computerized or not.
Logical process models - correct answer ✔-Models that describe processes,
without suggesting how they are conducted.
-When reading a logical process model you will not be able to tell whether a
process is computerized or manual whether a piece of information is collected
by paper from or the web, whether info is placed in filing cabinet or a large
database.
-These physical details are defined during the design phase when these
logical models are refined into physical models.
-By focusing on logical processes first analysts can focus on how the business
should run, without being distracted by implementation details.
Physical model - correct answer ✔- Provide information that is needed to
ultimately build the system.
, Four elements of a DFD - correct answer ✔1.) Processes
2.) Data flow
3.) Data stores
4.) External entities
Process - correct answer ✔- An activity or a function that is performed for
some specific business reason.
-Can be manual or computerized.
-Every process should be named starting with a verb and ending with a noun.
- Names should be short yet contain enough information so that the reader
can easily understand exactly what they do.
-Only one activity, avoid using the word "and"
Data Flow - correct answer ✔- A single fact, such as quantity available or a
logical collection of several facts.
-Every data flow should be named with a noun.
-The description of a data flow lists exactly what data elements the flow
contains.
-Data flows show what inputs go into each process and what outputs each
process produces.
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