What are the data components used by Hadoop?
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What is the need of MapReduce in Hadoop?
How to set the number of mappers to be created in MapReduce?
What are the various configuration parameters required to run a mapreduce job?
Explain what you understand by speculative execution
What are ‘reduces’?
In MapReduce, ideally how many mappers should be configured on a slave?
What is Output Format in MapReduce?
What is the best way to copy files between HDFS clusters?
What is difference between an input split and hdfs block?
What are the primary phases of a Reducer?
Illustrate a simple example of the working of MapReduce.
Mention what is the hadoop mapreduce apis contract for a key and value class?
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