What are the core methods of a Reducer?
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After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?
What are the port numbers of task tracker?
List some use cases where classification machine learning algorithms can be used.
Explain Data Locality in Hadoop?
Can you explain hadoop streaming?
What is the use of cloudera?
What happens if you get a ‘connection refused java exception’ when you type hadoop fsck /?
Mention what is rack awareness?
What is the non dfs used?
How can one check whether NameNode is working or not?
What are input format, input split & record reader and what they do?
What happen if number of reducer is set to 0 in Hadoop?
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