Techniques.Data Flow Diagrams

Question 1

____ show where data comes from, which activities process the data, and if the output results are stored or utilized by another activity or external entity.

Answer 1

Data flow diagrams show where data comes from, which activities process the data, and if the output results are stored or utilized by another activity or external entity.

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (Section 10.13.1, Kindle Locations 6792-6793). International Institute of Business Analysis. Kindle Edition.

Question 2

_____ portray the transformation of data. They are useful for depicting a transaction-based system and illustrating the boundaries of a physical, logical, or manual system.

Answer 2

Data flow diagrams portray the transformation of data. They are useful for depicting a transaction-based system and illustrating the boundaries of a physical, logical, or manual system.

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (Section 10.13.2, Kindle Locations 6794-6795). International Institute of Business Analysis. Kindle Edition.

Question 3

What is the highest level of abstraction for a Data Flow Diagram?

Answer 3

The highest level of abstraction for a Data Flow Diagram is the Context Diagram.

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (Section 10.13.2, Kindle Locations 6793-6794). International Institute of Business Analysis. Kindle Edition.

Question 4

____ illustrate the processes related to the system with the respective input data, output transformed data, and data stores.

Answer 4

Level 1 Data Flow Diagrams illustrate the processes related to the system with the respective input data, output transformed data, and data stores.

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (Section 10.13.2, Kindle Locations 6804-6805). International Institute of Business Analysis. Kindle Edition.

Question 5

What are the [4] elements of the Data Flow Diagram technique?

Answer 5

The [4] elements of the Data Flow Diagram technique are:

1. Externals (Entity, Source, Sink)
2. Data stores
3. Process
4. Data flow

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (Section 10.13.3, Kindle Location 6814). International Institute of Business Analysis. Kindle Edition.

Question 6

True or False - Data Flow Diagrams illustrate a sequence of activities?

Answer 6

False - Data Flow Diagrams do not illustrate sequence.

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (10,13,4 Kindle Location 6837). International Institute of Business Analysis. Kindle Edition.

Question 7

In a Data Flow Diagram, what are the characteristics of Externals?

Answer 7

In a Data Flow Diagram, Externals (entity, source, sink):

1. Is a person, organization, automated system, or any device which is outside the system under analysis and capable of producing data or receiving data.
2. Must have at least one data flow going to or coming from it.
3. Is represented by a noun.

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (Section 10.13.3, Kindle Locations 6816-6817). International Institute of Business Analysis. Kindle Edition.

Question 8

In a Data Flow Diagram, what are the characteristics of Data Stores?

Answer 8

In a Data Flow Diagram, a data store:

1. **Is a collection of data where data may be read repeatedly and where it can be stored for future use. In essence, it is data at rest.**
2. Must have at least one data flow going to or coming from it.

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (Section 10.13.3, Kindle Locations 6823-6824). International Institute of Business Analysis. Kindle Edition.

Question 9

In a Data Flow Diagram, what are the characteristics of Processes?

Answer 9

In a Data Flow Diagram, a Process:

1. Transforms the data into an output.
2. Should contain a verb and a noun.
3. Each process must have at least one data flow going to it and one data flow coming from it.

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (Section 10.3.3, Kindle Locations 6825-6828). International Institute of Business Analysis. Kindle Edition.

Question 10

In a Data Flow Diagram, what are the characteristics of Data Flows?

Answer 10

In a Data Flow Diagram, Data Flows:

1. Connect to or from a process (transformation of the data).
2. Show the inputs and outputs of each process.
3. Is named using a noun.

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (Section 10.13.3, Kindle Locations 6829-6832). International Institute of Business Analysis. Kindle Edition.

Question 11

Gane-Sarson and Yourdon-Coad are notations for the _____ technique.

Answer 11

Gane-Sarson and Yourdon are notations for the Data Flow Diagram technique.

International Institute of Business Analysis. A Guide to Business Analysis Body of Knowledge® (BABOK® Guide) (Section 10.13.2, Kindle Locations 6793-6794). International Institute of Business Analysis. Kindle Edition.