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what does this mean?

When a system is said to be operating in "problem state" what does this mean?

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A.
The system is using Rings 0 and 1

B.
The system is executing an application

C.
The system is in a fault state

D.
The system is in a ready state

Explanation:
Problem state means that an application code is executing, and the
system is in the process of solving the problems or challenges presented by that
application. Rings 0 and 1 are reserved for executing privileged instructions
specific to the operating system and its kernel. While these will be called into
play by an application, when they are executing the system is said to be in
supervisory state. Ready state is the term used to indicate the time between
application executions when other states like supervisory or wait states are
invoked, but the application stands ready to resume execution when these other
routines are finished. A system can be said to be in a fault state when operations
cease to execute altogether, but this is not considered an operating state.


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