What combiners is and when you should use a combiner in a MapReduce Job?
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A number of combiners can be changed or not in MapReduce?
What is the default value of map and reduce max attempts?
In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
What is sqoop in Hadoop ?
How many times combiner is called on a mapper node in Hadoop?
What main configuration parameters are specified in mapreduce?
Detail description of the Reducer phases?
Explain the general mapreduce algorithm
what daemons run on a master node and slave nodes?
What does a 'MapReduce Partitioner' do?
What is OutputCommitter?
What MapReduce framework consists of?
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