How to restart NameNode or all the daemons in Hadoop?
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Why is Data Block size set to 128 MB in Hadoop?
How do you overwrite replication factor?
Are there any special requirements for namenode?
Is there another way to check whether Namenode is working?
What do you understand by standalone (or local) mode?
When we send a data to a node, do we allow settling in time, before sending another data to that node?
What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?
What is NameNode? How NameNode tackle Datanode failures in Hadoop?
List Hadoop’s three configuration files?
What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?
Define “speculative execution” in hadoop?
When and how to create hadoop archive?
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