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What is data cleansing?
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What is the block size in Hadoop?
Is Namenode machine same as DataNode machine as in terms of hardware in Hadoop?
Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?
What are the different modes in which we can configure/install Hadoop?
Can you explain commodity hardware?
What is High Availability feature in Hadoop2?
Can you explain speculative execution?
Can you define a checkpoint?
Explain in which directory hadoop is installed?
What are the core components of Hadoop?
Clarify what a task tracker is in hadoop?
How is the splitting of file invoked in Hadoop framework?
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