Explain combiners.
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Compare Pig vs Hive vs Hadoop MapReduce?
How to optimize MapReduce Job?
Is it possible to search for files using wildcards?
Explain about the partitioning, shuffle and sort phase
What comes in Hadoop 2.0 and MapReduce V2 YARN
What is Output Format in MapReduce?
What are the various InputFormats in Hadoop?
How to specify more than one directory as input to the 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.
In mapreduce what is a scarce system resource? Explain?
What does a split do?
Is it possible to rename the output file?
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