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What is mapper in map reduce?
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Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
List the network requirements for using Hadoop ?
Is reduce-only job possible in Hadoop MapReduce?
Explain the Reducer's reduce phase?
How to sort intermediate output based on values in MapReduce?
How do reducers communicate with each other?
When Namenode is down what happens to job tracker?
How to configure the number of the Combiner in MapReduce?
Detail description of the Reducer phases?
What do sorting and shuffling do?
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
What is the input type/format in MapReduce by default?
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