mapper or reducer?
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how can you check whether Namenode is working beside using the jps command?
What is SequenceFileInputFormat in Hadoop MapReduce?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
Explain the differences between a combiner and reducer
Explain what you understand by speculative execution
What is the role of recordreader in hadoop mapreduce?
What is the next step after Mapper or MapTask?
How many InputSplits is made by a Hadoop Framework?
Compare Pig vs Hive vs Hadoop MapReduce?
Explain the Reducer's reduce phase?
What is Mapper in Hadoop MapReduce?
How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?
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