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what is JobTracker in Hadoop? What are the actions followed by Hadoop?
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MapReduce Types and Formats and Setting up a Hadoop Cluster?
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?
Explain the process of spilling in MapReduce?
What are the configuration parameters in the 'MapReduce' program?
What is the difference between an RDBMS and Hadoop?
When is it suggested to use a combiner in a MapReduce job?
What is the need of MapReduce in Hadoop?
What is Text Input Format?
Explain what is “map” and what is "reducer" in hadoop?
When is the reducers are started in a MapReduce job?
How many Mappers run for a MapReduce job in Hadoop?
What happens when a DataNode fails during the write process?
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