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Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
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What is shuffling and sorting in Hadoop MapReduce?
How many Reducers run for a MapReduce job in Hadoop?
How to set the number of reducers?
What combiners are and when you should utilize a combiner in a map reduce job?
What are the identity mapper and reducer in MapReduce?
When is the reducers are started in a MapReduce job?
What is the key- value pair in MapReduce?
Explain how mapreduce works.
What is SequenceFileInputFormat in Hadoop MapReduce?
With the help of two examples name the map and reduce function purpose
What happens when a datanode fails ?
How to set the number of mappers to be created in MapReduce?
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