What are the four essential parameters of a mapper?
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What is Combiner in MapReduce?
Where sorting is done on mapper node or reducer node in MapReduce?
What is difference between a MapReduce InputSplit and HDFS block
What are the steps involved in MapReduce framework?
List the network requirements for using Hadoop ?
How can we assure that the values regarding a particular key goes to the same reducer?
Compare RDBMS with Hadoop 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.
When is the reducers are started in a MapReduce job?
Where is Mapper output stored?
what does the text input format do?
What is map/reduce job in hadoop?
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