Explain the differences between a combiner and reducer
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Explain slot in Hadoop Map-Reduce v1?
How to optimize Hadoop MapReduce Job?
What do sorting and shuffling do?
What is a distributed cache in mapreduce framework?
What are the various input and output types supported by mapreduce?
How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?
what happens in textinformat ?
What do you mean by shuffling and sorting in MapReduce?
what is the Hadoop MapReduce APIs contract for a key and value class?
What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
Where the mapper's intermediate data will be stored?
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