Answer Posted / bindu
It takes the output of map task as input and then do reduce work.
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Explain what does the conf.setmapper class do?
How many Reducers run for a MapReduce job?
Can we submit the mapreduce job from slave node?
What are the key differences between Pig vs MapReduce?
What combiners is and when you should use a combiner in a MapReduce Job?
When is it not recommended to use MapReduce paradigm for large scale data processing?
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
Explain the general mapreduce algorithm
when do reducers play their role in a mapreduce task?
A number of combiners can be changed or not in MapReduce?
What is SequenceFileInputFormat?
Explain the difference between a MapReduce InputSplit and HDFS block?
what is NameNode in Hadoop?
What are the various input and output types supported by mapreduce?
what job does the conf class do?
