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CCD-410 · Question #49
CCD-410 Question #49: Real Exam Question with Answer & Explanation
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Question
The Hadoop framework provides a mechanism for coping with machine issues such as faulty configuration or impending hardware failure. MapReduce detects that one or a number of machines are performing poorly and starts more copies of a map or reduce task. All the tasks run simultaneously and the task finish first are used. This is called:
Options
- ATask does not report progress during timeout (default is 10 minutes) b) FairScheduler or
- BIdentityMapper
- CSpeculative execution causes results of task not to be needed since it has completed on other
- DDefault Partitioner
- ESpeculative Execution
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