Question

For Mutual exclusion to prevail in the system :

a) at least one resource must be held in a non sharable mode
b) the processor must be a uniprocessor rather than a multiprocessor
c) there must be at least one resource in a sharable mode
d) All of these

Answer 1

Mutual exclusion in a system requires specific conditions to be met: at least one non-sharable resource, a uniprocessor, and at least one sharable resource.

Step-by-step explanation:

Mutual exclusion refers to the property in which only one process or thread can access a resource at a time, ensuring that conflicting operations do not occur simultaneously. In order for mutual exclusion to prevail in a system, all of the following conditions must be met:

1. At least one resource must be held in a non-sharable mode, meaning that it cannot be simultaneously accessed by multiple processes or threads.
2. The processor must be a uniprocessor rather than a multiprocessor, as multiprocessor systems allow for parallel execution of multiple processes or threads.
3. There must be at least one resource in a sharable mode, indicating that it can be accessed by multiple processes or threads without conflicts.

These conditions ensure that only one process or thread can hold a non-sharable resource at a time and that conflicts are prevented when accessing sharable resources.