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Differentiate Reducer and Combiner in Hadoop MapReduce?
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Explain the difference between a MapReduce InputSplit and HDFS block?
what are the most common input formats defined in Hadoop?
How to submit extra files(jars, static files) for MapReduce job during runtime?
What is a scarce system resource?
List the configuration parameters that have to be specified when running a MapReduce job.
What is identity mapper and chain mapper?
What are the various configuration parameters required to run a mapreduce job?
What is the difference between HDFS block and input split?
What are the benefits of Spark over MapReduce?
What combiners are and when you should use a combiner in a mapreduce job?
Mention when to use Map reduce mode?
How to set the number of mappers to be created in MapReduce?
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