1. How multithread threads of a process can be lightweight

1. How multithread threads of a process can be lightweight when they are consuming same processor as required by a whole process? 

2. Give two reasons why caches are useful. What problems do they solve? What problems do they cause? If a cache can be made as large as the device for which it is caching (for instance, a cache as large as a disk), why not make it that large and eliminate the device? 

3. What is the function of a PC? Can a thread share PC as we say “threads share data”? Is there a way to reduce process context switching overhead?

4. Is it possible that we have an unlimited buffer size or we are saying it because a buffer size is very large?

5. Why everything cannot be handled at kernel mode and need to be transferred to user mode? 

6. Describe some of the challenges of designing operating systems for mobile devices compared with designing operating systems for traditional PCs?

7. In the One-to-One multithreading model, the number of threads per process sometimes are restricted due to overhead, why?


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