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Explain what is the function of mapreduce partitioner?
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What is reduce side join in mapreduce?
Why comparison of types is important for MapReduce?
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.
Explain the general mapreduce algorithm
Explain what does the conf.setMapper Class do in MapReduce?
What happens if the quantity of the reducer is 0 in mapreduce?
Where the mapper's intermediate data will be stored?
What combiners is and when you should use a combiner in a MapReduce Job?
When Namenode is down what happens to job tracker?
Explain what does the conf.setmapper class do?
List out Hadoop's three configuration files?
What is Hadoop Map Reduce ?
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