What is the purpose of textinputformat?
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What is mapper in map reduce?
Explain the difference between a MapReduce InputSplit and HDFS block?
What is identity mapper and reducer? In which cases can we use them?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
What are the primary phases of a Reducer?
What is Text Input Format?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
When is it not recommended to use MapReduce paradigm for large
What is a partitioner and how the user can control which key will go to which reducer?
What are the various input and output types supported by mapreduce?
Is it possible to search for files using wildcards?
What is heartbeat in hdfs? Explain.
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