Explain about the partitioning, shuffle and sort phase
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List out Hadoop's three configuration files?
What happens when a DataNode fails during the write process?
What is the data storage component used by Hadoop?
Whether the output of mapper or output of partitioner written on local disk?
What are the key differences between Pig vs MapReduce?
What are mapreduce new and old apis while writing map reduce program?. Explain how it works
what does the conf.setMapper Class do ?
How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?
What is the difference between HDFS block and input split?
Explain combiners.
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
What are the various InputFormats in Hadoop?
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