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what happens when Hadoop spawned 50 tasks for a job and one of the task failed?
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Where is the output of Mapper written in Hadoop?
Explain the general mapreduce algorithm
Explain Working of MapReduce?
What is the need of MapReduce?
It can be possible that a Job has 0 reducers?
How do ‘map’ and ‘reduce’ work?
How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?
Explain what is distributed cache in mapreduce framework?
Explain the differences between a combiner and reducer
What are the advantages of using map side join in mapreduce?
If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
how can you debug Hadoop code?
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