Answer: True Page: 316 LOD: Easy
Answer: True Page: 316 LOD: Easy
Answer: False Page: 316 LOD: Medium
Rationale: Logical models are implementation independent.
Answer: True Page: 317 LOD: Easy
Answer: True Page: 217 LOD: Easy
Answer: False Page: 317 LOD: Medium
Rationale: A data flow diagram (DFD) is a tool that depicts the flow of data through a system and the work or processing performed by that system. The DFD is a representation of the process model. An entity relationship diagram (ERD) is a representation of the data model.
Answer: True Page: 317 LOD: Easy
Answer: False Page: 317 LOD: Medium
Rationale: Another name for the data flow diagram is process model.
Answer: True Page: 321 LOD: Easy
Answer: True Page: 319 LOD: Easy
Answer: False Page: 319 LOD: Medium
Rationale: In DFDs, rounded rectangles are processes and squares are external agents.
Answer: False Page: 322 LOD: Medium
Rationale: A process is work performed on, or in response to, incoming data flows or conditions.
Answer: True Page: 320 LOD: Easy
Answer: False Page: 320 LOD: Medium
Rationale: Open-ended boxes are used for data stores and squares are used for external agents.
Answer: True Page: 325 LOD: Easy
Answer: True Page: 321 LOD: Easy
Answer: False Page: 320 LOD: Medium
Rationale: Data stores can be pulled from the entities on the entity relationship diagram.
Answer: True Page: 316 LOD: Medium
Answer: False Page: 317 LOD: Medium
Rationale: Flowcharts show the sequence of processes in an algorithm, while DFDs show the flow of data through the system.
Answer: True Page: 322 LOD: Easy
Answer: True Page: 322 LOD: Easy
Answer: True Page: 323 LOD: Easy
Answer: False Page: 323 LOD: Medium
Rationale: A decomposition diagram shows the top down functional decomposition and structure of a system.
Answer: False Page: 317, 323 LOD: Medium
Rationale: A data flow diagram is a tool that depicts the flow of data through a system and the work or processing performed by that system. A decomposition diagram shows the top down functional decomposition and structure of a system.