List out the some common problems faced by data analyst?
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What is a rack?
What are the hadoop configuration files at present?
What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?
what if job tracker machine is down?
Define data cleansing?
What are the features of Fully-Distributed mode?
Explain Erasure Coding in Hadoop?
What are the core components of Hadoop?
Is it possible to have hadoop job output in multiple directories? If yes, how?
What does the high availability of a name-node means? How is it accomplished?
Where are Hadoop’s configuration files located?
Explain how can you check whether namenode is working beside using the jps command?
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