System Development - Physical DFD

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What does the acronym CRUD stand for in the context of physical data flow diagrams?

Create, Read, Update, Delete (correct)

Create, Report, Update, Delete

Control, Review, Update, Delete

Create, Review, Update, Delete

What is a characteristic of physical data flow diagrams compared to logical data flow diagrams?

They are used for designing databases.

They are less complex due to fewer data stores.

They are more complex due to the many data stores present. (correct)

They are used for analyzing user groups.

What is the primary purpose of a series of layered data flow diagrams?

To create a list of data stores

To analyze detailed procedures in the larger system (correct)

To design a new system from scratch

To identify external entities in the system

What is the purpose of a CRUD matrix?

To determine which programs or processes add, read, update, or delete master file records. Signup and view all the answers

What is an external entity in the context of a data flow diagram?

An entity that sends or receives data from the system Signup and view all the answers

What is an intermediate data store used for?

To store data between processes. Signup and view all the answers

When should processes be grouped into separate computer programs?

When they are performed by different user groups. Signup and view all the answers

How are data flows that occur simultaneously depicted in a data flow diagram?

Through the use of parallel arrows Signup and view all the answers

What is a key characteristic of a data flow leaving a process?

It has a different label than the data flow entering the process Signup and view all the answers

What is a consideration when deciding how to group automated procedures into computer programs?

The timing of the processes. Signup and view all the answers

What type of data stores are not included on a data flow diagram?

Temporary data stores Signup and view all the answers

What is the first step in drawing a data flow diagram?

Collapse the organization's system narrative into a list with four categories Signup and view all the answers

What is the cardinality of processes that can be included in a context diagram without making it cluttered?

Between 5 and 9 Signup and view all the answers

How are the processes numbered in a context diagram?

Numerically, starting from the upper left-hand corner Signup and view all the answers

What is the concept of tracing a series of processes through many levels of explosion?

Parent-child process Signup and view all the answers

What is the correct order of creating data flow diagrams?

Analyze the current system, then add features to the new system Signup and view all the answers

What is a characteristic of a context diagram?

It depicts the entire system Signup and view all the answers

What is a result of exploding a process on a diagram?

The creation of a child diagram Signup and view all the answers

System Development - Physical DFD

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