Operating Systems

2.Discuss the importance of the process descriptor (PCB). What data does it con tain? Is there any other relevant data about a process that would need to be included in the PCB?

7.Explain why the context switch time is considered overhead. Give examples.

8.Explain the diferences among processes, programs, and threads. List the basic possible states for a process. Discuss any additional state. Is it possible to have intermediate states?

9.Is multiprogramming more useful in a multiuser system or a single-user system? Discuss your arguments.

12.Write a simple program in Java that creates and starts three or more threads. These should display a message then terminate.

13. Repeat the previous exercise using C++ instead of Java.