Andrew S. Tanenbaum (OS) Edition 4 Exercise 6 Question 9 (Page No. 466)

Question

Fig. 6-3 shows the concept of a resource graph. Do illegal graphs exist, that is, graphs that structurally violate the model we have used of resource usage? If so, give an example of one.

Answer 1

Yes possible.

Example: For a single resource system, resource having multiple outgoing edge. (Allocated to multiple process at a time).