Question

The following is a jumbled list of the activities suggested in this text for drafting data flow diagrams (DFDs) for an existing system:

I. Prepare a table of entities and activities.
II. Prepare an annotated table of entities and activities.
III. Draw a physical data flow diagram.
IV. Draw a logical data flow diagram.
V. Draw a context diagram.
The best sequence for undertaking these activities is:
a. I, II, V, III, IV
b. I, V, III, II, IV
c. II, I, III, V, IV
d. II, IV, III, I, V

Answer 1

The best sequence for undertaking the activities suggested for drafting data flow diagrams (DFDs) for an existing system is: Option B. I, V, III, II, IV.

Step-by-step explanation:

To begin, preparing a table of entities and activities (I) allows for initial data organization, followed by drawing a context diagram (V) to understand system boundaries. Subsequently, drawing a physical data flow diagram (III) helps visualize the actual flow within the system. Annotated tables (II) refine the understanding of entities and activities, leading to the logical data flow diagram (IV), which encapsulates a more refined and comprehensive representation of the system.

Starting with an entity and activity table establishes a foundation, followed by broad contextual understanding through the context diagram. Then, delving into the specifics through physical and logical DFDs, supported by annotated tables, enables a thorough and systematic approach to comprehending and representing an existing system's data flow.

In summary, the best sequence for undertaking these activities are:

• I. Prepare a table of entities and activities.
• V. Draw a context diagram.
• III. Draw a physical data flow diagram.
• II. Prepare an annotated table of entities and activities.
• IV. Draw a logical data flow diagram.

Correct Answer: b. I, V, III, II, IV