What is Fault Tolerance?
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Name the files which are used by the startup and shutdown commands?
What is the NameNode port number?
What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?
What are the important features of hadoop?
What is pseudo-distributed mode?
Why do the nodes are removed and added frequently in a hadoop cluster?
What kind of hardware is best for hadoop?
How to do ‘map’ and ‘reduce’ works?
What is JPS? Why is it used in Hadoop?
What happens if you get a ‘connection refused java exception’ when you type hadoop fsck /?
Define a record reader?
What do you understand by unit and ()in scala?
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