You are the IT director at Big Ten University. As part of a training program, you decide to draw a DM that includes some obvious mistakes to see whether your newly hired junior analysts can find them. You came up with the diagram 0 DFD shown in Figure 5-22. Based on the rules explained in this chapter, how many problems should the analysts find?

FIGURE 5-22 What are the mistakes in this diagram 0 DFD?

1 ASSIGN ADVISOR INSTRUCTOR SCHEDULE OF OFFICE HOURS STUDENT STUDENT ID NUMBER CLASS ROSTER STUDENT ID NUMBER 2 MEET WITH ADVISOR FINAL CLASS SCHEDULE TENTATIVE SCHEDULE D5 CLASS ROSTER STUDENTS ATTENDING D6 SEATING CHART CALCULATE GRADE FINAL GRADE 3 CHECK OPEN CLASSES D4 GRADES