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CCD-410 · Question #42
CCD-410 Question #42: Real Exam Question with Answer & Explanation
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Question
You have just executed a MapReduce job. Where is intermediate data written to after being emitted from the Mapper's map method?
Options
- AIntermediate data in streamed across the network from Mapper to the Reduce and is never written
- BInto in-memory buffers on the TaskTracker node running the Mapper that spill over and are written
- CInto in-memory buffers that spill over to the local file system of the TaskTracker node running the
- DInto in-memory buffers that spill over to the local file system (outside HDFS) of the TaskTracker
- EInto in-memory buffers on the TaskTracker node running the Reducer that spill over and are written
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