What is CAP Theorem? What aspects does Hadoop support from this theorem?
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What are the side effects of not running a secondary name node?
What is the difference between TextinputFormat and KeyValueTextInputFormat class?
In which directory hadoop is installed?
Name the operating system(s) which are supported for production hadoop deployment?
Explain how can you debug hadoop code?
How can one check whether NameNode is working or not?
What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?
Can you explain commodity hardware?
What are the core components of Hadoop?
What a task tracker is in hadoop?
Explain the core methods of the reducer?
Can you explain speculative execution?
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