what is a Task Tracker in Hadoop?
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What do you know about nlineinputformat?
Can there be no Reducer?
What is identity mapper and chain mapper?
What is shuffling in mapreduce?
How to create a custom key and custom value in MapReduce Job?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
What can be optimum value for Reducer?
List the configuration parameters that have to be specified when running a MapReduce job.
what does the conf.setMapper Class do ?
What does a split do?
Different ways of debugging a job in MapReduce?
What is difference between a MapReduce InputSplit and HDFS block
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