Ch 5

Data flow diagramming is:

Focused on the processes or activities that are performed

Ruth is an analyst. On her DFD diagram she has just placed a process. She will

Give it a verb phrase name, like 'search inventory'

Chunxia is balancing her DFD. This means she is:

Making sure that all information presented at one level is accurately represented in the next level

Processes in data flow diagramming are represented by:

Rounded boxes

Ramesh has drawn a set of DFD's that are not properly balanced. This is probably a:

Syntax error

The context diagram shows:

The "big picture" of the system with external entities and only one process

Which Data Flow Diagram shows the entire system with its environment with only one process?

Context Diagram

Andrei has a diagram that shows only one process and external entities. He is developing a:

Context diagram

Which Data Flow Diagram does not have data stores?

Context diagram

Amy has created a context diagram. What one DFD component is probably not shown?

Data Storage

A process model is

A formal way of representing how a business system operates

On your level 0 diagram you have a process #2 and when you create a level 1 diagram for process #2, you might have processes like:

2.1, 2.2, 2.3

Carlos has a Level 0 DFD diagram where one of the external entities is the "Internal Revenue Service" - and he has a data store called "Tax Rate Table". He has drawn a data flow arrow from the Internal Revenue Service to the data store as the data has been loaded into the Tax Rate Table prior to the processing. What would be true?

26?

A payroll data flow diagram has a data-store called Accumulated Salary Data. At one stage in the DFD, a process "Calculate YTD-Taxes" gets data from that data store, updates it in the process, and writes it back out. The diagram should show:

A line out of the data store labeled: Current YTD Payroll Details; and a line into the data store labeled: Updated YTD Payroll Details

Andrea is creating a diagram model for processes (without regard to whether it is computerized or a manual process). She is probably creating _______________

A logical process model

An external entity is:

A person, organization or system outside of the system

Vanessa has a data flow diagram with an item called 'Register for Class'. That item would be:

A process

Which of the following would be a 'black hole' error on a DFD?

A process has no output

A data flow is:

A single piece of data

A data flow is:

A single piece of data within a system

A process is:

An activity of a function that is performed for some specific business reason

Decomposing a DFD means:

Breaking complex processes into a structured set of detailed diagrams

A process model can __________

Document both the as-is and the to-be system

Which of the following is NOT correct?

Every process must be broken down farther on Level 1 and Level 2 diagrams

Which would be the normal order of tasks?

Interviewing and/or JAD sessions; creating use cases; creating data flow diagrams

What diagram will have processes with one decimal place (like 3.1, 3.2, and 3.3) and might have flows coming in (or going out) that are not illustrated?

Level 1 diagram

What diagram will have sub-processes with numbers like 3.3.1, 3.3.2, 3.3.3 (etc) and also have flows coming in (or going out) that are not illustrated?

Level 1 diagram

Logical process models are:

Models that describe processes without suggesting how they are conducted

James is developing a DFD. What would be a good name for him to use on a data flow from the Calculate Federal Withholding process to a data store called YTD Payroll Data?

Move withholding to YTD storage

Tom is trying to change his Use Case into a Data Flow Diagram. He has found that a use case step generally is the same as a ________ on the Level 1 Data flow diagram

Process

Brianna has a process has two inputs but only one output

This is an error as processes only produce output

Mark has a data store called 'Items' and it includes all the items sold in a convenience store - sorted by UPC code with the retail price of the item. He has only one data flow called 'Item Details' that flows from the data store to the Process Checkout process. What will be true in this case?

This is incorrect as every data store must have both inputs and outputs

The relation between use cases and data flow diagrams is generally:

Use cases are developed first and then data flow diagrams ensue

The relationship between use cases and data flow diagrams is:

Use cases tend to be developed with users to make sure the analyst has fully captured the processes and relationships; DFD's are built upon the use cases to more fully formally understand the processes involved

Data flow diagrams are:

Usually created by the project team and reviewed by users for correctness