Explain the Job OutputFormat?
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How can one increase replication factor to a desired value in Hadoop?
What is the default block size in hdfs?
What is 'Key value pair' in HDFS?
What are the port numbers of namenode, job tracker and task tracker?
Have you ever used Counters in Hadoop. Give us an example scenario?
Why do we use Hadoop?
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What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?
What problems have you faced when you are working on Hadoop code?
What are the Basics of Hadoop?
How many JVMs run on a slave node?
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