What is the relationship between Job and Task in Hadoop?
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What is the difference between RDBMS with Hadoop MapReduce?
What is difference between an input split and hdfs block?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
What is the Hadoop MapReduce API contract for a key and value Class?
How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?
What is Data Locality in Hadoop?
Why Mapreduce output written in local disk?
What is LazyOutputFormat in MapReduce?
what is "map" and what is "reducer" in Hadoop?
What are the four essential parameters of a mapper?
What does conf.setmapper class do?
what are the three modes in which Hadoop can be run?
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