How indexing is done in HDFS?
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Is fs.mapr.working.dir a single directory?
Rack awareness of Namenode?
How do you define "block" in HDFS?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
How blocks are distributed among all data nodes for a particular chunk of data?
Does google use hadoop?
What are the port numbers of namenode, job tracker and task tracker?
Where do you specify the Mapper Implementation?
What is the Use of SSH in Hadoop ?
Explain the master class and the output class do?
how would you modify that solution to only count the number of unique words in all the documents?
What is Your Cluster size ?
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