What is identity mapper and identity reducer?
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What is the need of MapReduce?
Define Writable data types in MapReduce?
Explain the Reducer's Sort phase?
Explain combiners.
What is a RecordReader in Hadoop MapReduce?
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
What is a mapreduce algorithm?
What are the four basic parameters of a reducer?
Which are the methods in the mapper interface?
what is a Task Tracker in Hadoop?
Which Sorting algorithm is used in Hadoop MapReduce?
How to set the number of mappers for a MapReduce job?
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