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What is a combiner and where you should use it?
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More MapReduce Interview Questions
what is Speculative Execution?
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 are the key differences between Pig vs MapReduce?
How many numbers of reducers run in Map-Reduce Job?
Explain JobConf in MapReduce.
Explain the input type/format in mapreduce by default?
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How to set mappers and reducers for MapReduce jobs?
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