What type of data hadoop can handle ?
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How NameNode tackle Datanode failures in Hadoop?
Give me the examples of Columnar database ?
Explain what is a task tracker in hadoop?
Explain some important features of hadoop?
What is Identity reducer?
Can you explain record reader?
After increasing the replication level, I still see that data is under replicated. What could be wrong?
How jobtracker assign tasks to the tasktracker?
Explain is it possible to search for files using wildcards?
Which operating system(s) are supported for production hadoop deployment?
How to create the directory when name node is in safe mode?
How would you check whether your NameNode is working or not?
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