What is partitioning in MapReduce?
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Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
How to create custom key and custom value in MapReduce Job?
What is a "reducer" in Hadoop?
How does MapReduce framework view its input internally?
what are the most common input formats defined in Hadoop?
What is a distributed cache in mapreduce framework?
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.
How to set which framework would be used to run mapreduce program?
List the network requirements for using Hadoop ?
Write a Mapreduce Program for Character Count ?
What comes in Hadoop 2.0 and MapReduce V2 YARN
When is the reducers are started in a MapReduce job?
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