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In MapReduce Data Flow, when Combiner is called?
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Explain the input type/format in mapreduce by default?
What is partitioner and its usage?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
How data is spilt in Hadoop?
How do ‘map’ and ‘reduce’ work?
What is the default value of map and reduce max attempts?
Illustrate a simple example of the working of MapReduce.
What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
Explain what is “map” and what is "reducer" in hadoop?
In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
What is an input reader in reference to mapreduce?
What is a combiner and where you should use it?
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