Chapter 7: Deadlocks. Exercise

 Chapter 7: Deadlocks.

a)    What is deadlock?



b)    Draw FOUR (4) symbols used in Resources-Allocation Graph as follows.

    I ) Process


    II) Resources Type with three instances


    III) Pi requests instances of Rj


    IV) Pi is holding an instances of Rj

Rujuk Nota (slide) berikut.


+ Security

c) A password may become known to other users in a variety of ways. Is there a simple method for detecting that such event has occurred? Explain your answer.


d) The list of all passwords is kept within the operating system. Thus, if a user manages to read this list, password protection is no longer provided. Suggest a scheme that will avoid this problem.