What You Need to Know About Data-Flow Diagrams
Understanding Data-Flow Diagrams
Data-flow diagrams depict the flow of data between different processes, and they are commonly known as flow models because they emphasize the movement of data through a system.
Data at Rest in Data-Flow Diagrams
Data at rest refers to data that is stored or persisted in various physical representations, such as databases, files, or other storage media. In the context of data-flow diagrams, when data is not actively flowing between processes, it is typically represented as a data store.
14. What is the point of contact where a system meets its environment or where subsystems merge referred to as? Answer: The point of contact where a system meets its environment or where subsystems merge is best described as Interfaces.Understanding Interfaces in Data-Flow Diagrams
The point of contact where a system interacts with its environment or where subsystems come together is referred to as an interface. Interfaces define how different components or systems communicate and exchange information.
15. What are the true statements regarding the labels in tables and lists? Answer: All columns.and rows should not have meaningful labels, Labels should be separated from other information by using highlighting, Redisplay labels when the data extend beyond a single screen or page. All answers are correct.Labels in Tables and Lists
Regarding labels in tables and lists, all columns and rows should not have meaningful labels to avoid confusion with actual data values. Labels should be visually separated from other information using highlighting to improve clarity. When data extends beyond a single screen or page, it is important to redisplay labels to maintain context and understanding for the reader. Therefore, all the given options are correct.
16. What is losing characters from a field referred to as? Answer: Losing characters from a field is a Truncating data error.Truncating Data Error
Losing characters from a field refers to the situation where some characters or data within a specific field or attribute are unintentionally removed or truncated. This error is commonly known as a truncating data error.