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What do you understand by a closure in scala?
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Why do we need Hadoop?
Do we require two servers for the namenode and the datanodes?
Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
Why Hadoop performs replication, although it results in data redundancy?
How Big is ‘Big Data’?
What is Small File Problem in Hadoop? How can it be resolved?
How does hadoop achieve fault tolerance?
What are the tools used in big data?
What is the default replication factor in Hadoop and how will you change it?
List of some best tools that can be useful for data-analysis?
Explain about Hadoop file system and processing framework?
Explain how do you overwrite replication factor?
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