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What is Federation?
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Why do the nodes are removed and added frequently in a hadoop cluster?
Clarify what is sequence file input format?
Whats the default port that jobtrackers listens ?
What is CAP Theorem? What aspects does Hadoop support from this theorem?
How can you set an arbitrary number of mappers to be created for a job in Hadoop?
Can you define udf?
What is configured in /etc/hosts and what is its role in setting Hadoop cluster?
How to specify more than one path for storage in Hadoop?
What are the parameters of mappers and reducers?
Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
Can hadoop replace relational database?
How does hadoop achieve fault tolerance?
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