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Explain what is hadoop?
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Is hadoop still in demand?
List out the different stream grouping in apache storm?
What is the number of default partitioner in hadoop?
What are the four modules that make up the Apache Hadoop framework?
What are the port numbers of task tracker?
Define “speculative execution” in hadoop?
Ideally what should be the block size in hadoop?
How to handle bad records during parsing?
What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?
What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?
How to add/delete a Node to the existing cluster?
If datanodes increase, then do we need to upgrade namenode?
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