18 Questions
What does the acronym CRUD stand for in the context of physical data flow diagrams?
Create, Read, Update, Delete
What is a characteristic of physical data flow diagrams compared to logical data flow diagrams?
They are more complex due to the many data stores present.
What is the primary purpose of a series of layered data flow diagrams?
To analyze detailed procedures in the larger system
What is the purpose of a CRUD matrix?
To determine which programs or processes add, read, update, or delete master file records.
What is an external entity in the context of a data flow diagram?
An entity that sends or receives data from the system
What is an intermediate data store used for?
To store data between processes.
When should processes be grouped into separate computer programs?
When they are performed by different user groups.
How are data flows that occur simultaneously depicted in a data flow diagram?
Through the use of parallel arrows
What is a key characteristic of a data flow leaving a process?
It has a different label than the data flow entering the process
What is a consideration when deciding how to group automated procedures into computer programs?
The timing of the processes.
What type of data stores are not included on a data flow diagram?
Temporary data stores
What is the first step in drawing a data flow diagram?
Collapse the organization's system narrative into a list with four categories
What is the cardinality of processes that can be included in a context diagram without making it cluttered?
Between 5 and 9
How are the processes numbered in a context diagram?
Numerically, starting from the upper left-hand corner
What is the concept of tracing a series of processes through many levels of explosion?
Parent-child process
What is the correct order of creating data flow diagrams?
Analyze the current system, then add features to the new system
What is a characteristic of a context diagram?
It depicts the entire system
What is a result of exploding a process on a diagram?
The creation of a child diagram
This quiz covers the final stages of system development, including the creation of physical data flow diagrams and the importance of CRUD operations. It also touches on the benefits of a more stable system centered on business events.
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