What do you mean by the NameNode High Availability in hadoop?
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Explain Erasure Coding in Hadoop?
Mention what is distributed cache in hadoop?
what happens when namenode goes down during file read operation in hadoop?
List out the some common problems faced by data analyst?
What are the important features of hadoop?
Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?
What does rack awareness algorithm means and why is it utilized as a part of hadoop?
What is the difference between a hadoop database and relational database?
What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?
If DataNode increases, then do we need to upgrade NameNode in Hadoop?
Explain how Hadoop cluster hardware planning and provisioning is done?
When we send a data to a node, do we allow settling in time, before sending another data to that node?
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