What are the primary phases of a Reducer?
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How is mapreduce related to cloud computing?
What is the relation between MapReduce and Hive?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
Define speculative execution?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?
how Hadoop is different from other data processing tools?
What does a split do?
what job does the conf class do?
Explain what combiners are and when you should use a combiner in a mapreduce job?
What can be optimum value for Reducer?
Why is Apache Spark faster than Hadoop MapReduce?