Explain Data Locality in Hadoop?
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How many job tracker processes can run on a single Hadoop cluster?
If DataNode increases, then do we need to upgrade NameNode in Hadoop?
What happens in text format?
What is the difference between a hadoop database and relational database?
What are the network requirements for hadoop?
Mention what does the text input format do?
How to add/delete a Node to the existing cluster?
What type of data hadoop can handle ?
Name the files which are used by the startup and shutdown commands?
What is the non dfs used?
What are the four basic parameters of a mapper?
How to restart NameNode or all the daemons in Hadoop?
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