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Q. Presume that a system is in an unsafe state. Illustrate that it is possible for the processes to complete their execution without entering a deadlock state.
Answer: An unsafe state mayn't necessarily lead to deadlock it just means that we cannot guarantee that deadlock will not take place. Therefore it is possible that a system in an unsafe state may still permit all processes to complete without deadlock occurring. Consider the circumstances where a system has 12 resources allocated among processes P0, P1, and P2. The resources are owed according to the following policy.
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Hashed page table method A general approach for managing address spaces larger than 32 bits is to use a hashed page table with the hash values being the virtual-page number.
Q. Is disk scheduling except FCFS scheduling useful in a single-user environment? describe your answer. Answer: In a single-user environment the I/O queue typically is empty.
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