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ISRO2008-58

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Correct Answer: (b)

Explanation: Checkpointing is a method of periodically saving the state of a job so that, if for some reason, the job does not complete, it can be restarted from the saved state. Checkpoints can be taken either under the control of the user application or external to the application.

Reference: Checkpointing a job - IBM

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Checkpointing is a technique to add fault tolerance into computing systems. It basically consists of saving a snapshot of the application's state, so that it can restart from that point in case of failure. This is particularly important for long running application that are executed in vulnerable computing system.So the most appropriate answer is D

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