Explain InputSplit in Hadoop?
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Can you explain speculative execution?
What is replication factor?
Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?
Ideally what should be replication factor in a Hadoop cluster?
Do we need to place 2nd and 3rd data in rack 2 only?
What does the high availability of a name-node means? How is it accomplished?
What are the important modes of hadoop?
Ideally what should be the block size in hadoop?
Explain the difference between an inputsplit and a block?
What is the difference between namenode and datanode in hadoop?
How is security achieved in Hadoop?
What do you know about yarn?
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