For non sharable resources like a printer, mutual exclusionGroup of answer choicesmay existnone of thesemust existmust not exist

Analyzing the Question on Mutual Exclusion for Non-Sharable Resources

1. Understanding the Context
   Non-sharable resources, like printers, are single instances that multiple processes or users may need to use concurrently. The primary concern here is ensuring that only one process can access the resource at a time to avoid conflicts.

2. Defining Mutual Exclusion
   Mutual exclusion is a property of concurrency control, which states that if one process is accessing a non-sharable resource, other processes must be excluded from doing the same until the resource is freed.

3. Analyzing the Options

   • May exist: This implies that a mutual exclusion mechanism could be implemented but is not guaranteed.
   • None of these: Suggests that the answer does not fall under the other given options.
   • Must exist: This indicates that mutual exclusion is necessary for non-sharable resources to function correctly.
   • Must not exist: Implies that mutual exclusion should be avoided, which contradicts the need for controlling access to non-sharable resources.

Conclusion

In this context, mutual exclusion must exist for non-sharable resources like printers to prevent conflicts and ensure efficient operation. Without mutual exclusion, multiple processes attempting to use the printer simultaneously could lead to errors and resource contention.

Final Answer

Must exist.