Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?
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Explain how can we check whether namenode is working or not?
Explain what is webdav in hadoop?
What are the limitations of Hadoop?
After increasing the replication level, I still see that data is under replicated. What could be wrong?
Can you explain sequence file in hadoop?
Ideally what should be the replication factor in hadoop?
What is tasktracker in hadoop?
What is rack awareness in hadoop?
What do you know about the speculative execution?
How is security achieved in Hadoop?
What are the important modes of hadoop?
Define data cleansing?
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