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What are preemptive and non-preemptive algorithms?
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Preepmtive Non-preemptive
1. Resources allocated toprocess for limited time. 1. Resources alotted till process is
complete/switches to waiting.
2. Processes can be interrupted. 2. Process cannot be interrupted.
3. Low priority process maystarve. 3. Short timed process may starve.
4. Has overheads. 4. No overheads.
5. Flexible. 5. Rigid.
6. Cost associated. 6. Not cost associative.
7. Waiting time, Response timeis less 7. Waiting time, Response time ismore.
SRTF (Shortest Response
Time First)
Priority
Round Robin
FIFO / FCFS
SJF (Shortest Job First)
Priority
- Multilevel Queue Scheduling
- Multilevel Feed-back Queue Scheduling
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