How to write MapReduce Programs?
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What are ‘reduces’?
What are the four essential parameters of a mapper?
What is InputFormat in Hadoop MapReduce?
What is shuffleing in mapreduce?
Can MapReduce program be written in any language other than Java?
What is RecordReader in a Map Reduce?
Explain how do ‘map’ and ‘reduce’ work?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
Explain combiners.
What happens when a DataNode fails during the write process?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
List the configuration parameters that have to be specified when running a MapReduce job.
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