What is difference between reducer and combiner?
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What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
What are 'slaves' and 'masters' in Hadoop?
When we send a data to a node, do we allow settling in time, before sending another data to that node?
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What is difference between reducer and combiner?
Explain what is speculative execution?
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Can I set the number of reducers to zero?
Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
What does secondary name-node means?
Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?
Explain the difference between an inputsplit and a block?
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