What is the difference between RDBMS with Hadoop MapReduce?
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How to create custom key and custom value in MapReduce Job?
A number of combiners can be changed or not in MapReduce?
What is a MapReduce Combiner?
What is MapReduce?
What is a partitioner and how the user can control which key will go to which reducer?
What is the role of recordreader in hadoop mapreduce?
Is it possible to rename the output file?
Is reduce-only job possible in Hadoop MapReduce?
what does the text input format do?
What is the input type/format in MapReduce by default?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
what job does the conf class do?
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