A number of combiners can be changed or not in MapReduce?
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How does MapReduce framework view its input internally?
What does conf.setmapper class do?
Explain what is “map” and what is "reducer" in hadoop?
What are the primary phases of a Reducer?
What are the advantages of using mapreduce with hadoop?
Explain the Reducer's reduce phase?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
How hadoop mapreduce works?
Why can aggregation not be done in Mapper in MapReduce?
what is a sequence file in Hadoop?
What is the default value of map and reduce max attempts?
Differentiate Reducer and Combiner in Hadoop MapReduce?
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