Question 46

The DFD in Figure 2 below was created, corresponding to the E-R diagram in Figure 1 for order entry processing. Which of the following is an entity corresponding to data store Z in Figure 2? In this example, the relationships between entities in the E-R diagram are defined such that 1 represents 1, and an asterisk (*) represents many.

a) Customer master file
b) Inventory file
c) Product master file
d) Order detail file

answer