What do you understand by mapreduce?
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A number of combiners can be changed or not in MapReduce?
what job does the conf class do?
Is YARN a replacement of Hadoop MapReduce?
Why do we need MapReduce during Pig programming?
Explain what is distributed cache in mapreduce framework?
Explain what you understand by speculative execution
What is the difference between HDFS block and input split?
How to optimize MapReduce Job?
what are the most common input formats defined in Hadoop?
What is the key- value pair in Hadoop MapReduce?
what are the basic parameters of a Mapper?
What is Counter in MapReduce?