what is NameNode in Hadoop?
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What happens when a DataNode fails during the write process?
What is SequenceFileInputFormat in Hadoop MapReduce?
What is the process of changing the split size if there is limited storage space on Commodity Hardware?
Explain what you understand by speculative execution
What is map/reduce job in hadoop?
Detail description of the Reducer phases?
What is the Job interface in MapReduce framework?
What is an identity mapper and identity reducer?
Explain what combiners are and when you should use a combiner in a mapreduce job?
what job does the conf class do?
How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?
How does MapReduce framework view its input internally?
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