How did you debug your Hadoop code ?
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What is a Record Reader in hadoop?
How the Client communicates with HDFS?
How can we check whether namenode is working or not?
What is HDFS Block size? How is it different from traditional file system block size?
How does an hadoop application look like or their basic components?
What is Your Cluster size ?
What is Partioner in hadoop? Where does it run
How Mapper is instantiated in a running job?
What is the port number for NameNode
What is speculative execution in Hadoop?
What is a spill factor with respect to the ram?
Why the name ‘hadoop’?
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