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What is MapReduce? What are the syntax you use to run a MapReduce program?
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What are the main configuration parameters in a MapReduce program?
List the network requirements for using Hadoop ?
How can we control particular key should go in a specific reducer?
Which Sorting algorithm is used in Hadoop MapReduce?
Explain the differences between a combiner and reducer
Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?
What combiners is and when you should use a combiner in a MapReduce Job?
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.
Where sorting is done in Hadoop MapReduce Job?
What is a TaskInstance?
In MapReduce Data Flow, when Combiner is called?
what is a sequence file in Hadoop?
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