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What happens when a DataNode fails during the write process?
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How can we control particular key should go in a specific reducer?
How does Mappers run method works?
What are the four basic parameters of a reducer?
what daemons run on a master node and slave nodes?
what are the main configuration parameters that user need to specify to run Mapreduce Job ?
Clarify what is shuffling in map reduce?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
Explain what does the conf.setmapper class do?
What does a 'MapReduce Partitioner' do?
In MapReduce, ideally how many mappers should be configured on a slave?
What is Distributed Cache in the MapReduce Framework?
What is the Job interface in MapReduce framework?
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