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Details

A & D
Ch. 9 IN THE HOUSE!!!!
10
Computer Science
Undergraduate 4
10/26/2009

Additional Computer Science Flashcards

 


 

Cards

Term
PROCESS MODELING
Definition
 Focuses on the system’s processes and their inputs and outputs.
Term

Logical models ONLY show WHAT a system is or does.

Physical models show WHAT a system is or does AND HOW the system will be physically/technically implemented.

Definition
What is the key difference between logical and physical models?
Term
Process modeling
Definition
  A technique used to document a system’s processes.
Term

DATA FLOW DIAGRAM (AKA DFD)

 

Memory Tip:

   D --> Depict

F --> Flow

 D --> Data

Definition
A process model used to depict the flow of data through a system and the work or processing performed by the system.
Term
PROCESSES or work to be done.
Definition
In DFD, what does a rounded rectangle represent?
Term
EXTERNAL AGENTS -- the boundary of the system
Definition

In DFD, what do squares represent?

 

Term
DATA STORES -- AKA files/databases
Definition
In DFD, what do open-ended boxes represent?
Term
Data flows -- inputs/outputs
Definition
In DFD, what do arrows represent?
Term
EXTERNAL AGENT
Definition
A person, organization unit, outside system or organization that lies outside of scope of project yet interacts with system is a(n) __________.
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