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What is job tracker in Hadoop?
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Can you define inputsplit in hadoop?
What kind of hardware is best for hadoop?
What does the high availability of a name-node means? How is it accomplished?
What do you know about yarn?
Which modes can Hadoop be run in? List a few features for each mode?
Can you explain sequence file in hadoop?
Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?
Name the files which are used by the startup and shutdown commands?
How often do you need to reformat the namenode?
Why do we need Hadoop?
What did mean by data-node?
Tell me some major benefits of Hadoop?
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