Explain what you understand by speculative execution
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What does a 'MapReduce Partitioner' do?
Explain what is the function of mapreduce partitioner?
Explain the Reducer's reduce phase?
Where is Mapper output stored?
What do you know about nlineinputformat?
What do you understand by mapreduce?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
What is a map side join?
How many numbers of reducers run in Map-Reduce Job?
In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
What is a TaskInstance?
What are mapreduce new and old apis while writing map reduce program?. Explain how it works
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