What are the most common InputFormats in Hadoop?
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What is a Heartbeat in Hadoop?
What is the purpose of RecordReader in hadoop?
How Hadoop is cost-effective?
Is Namenode machine same as DataNode machine as in terms of hardware?
How to handle bad records during parsing?
what happens when namenode goes down during file read operation in hadoop?
Is there another way to check whether Namenode is working?
What does block mean?
Have you ever used counters in hadoop?
Explain what is speculative execution?
Which directory does hadoop install to?
How to use combiner in hadoop ?
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