What is the data storage component used by Hadoop?
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In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
What are the fundamental configurations parameters specified in map reduce?
What is a "map" in Hadoop?
Why MapReduce uses the key-value pair to process the data?
Explain what you understand by speculative execution
What is the relation between MapReduce and Hive?
A number of combiners can be changed or not in MapReduce?
How many Mappers run for a MapReduce job in Hadoop?
Where is Mapper output stored?
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
What is the difference between Job and Task in MapReduce?
When Namenode is down what happens to job tracker?
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