What is 'jps'?
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What is active and passive NameNode in Hadoop?
What is Mapper? How can we compress Mapper output in Hadoop?
Explain the difference between an inputsplit and a block?
How often DataNode send heartbeat to NameNode in Hadoop?
Can you explain rack awareness?
What is Slot in Hadoop v1? Why was it removed from Hadoop v2?
How will you write a custom partitioner for a Hadoop job?
Have you ever used counters in hadoop?
What does the high availability of a name-node means? How is it accomplished?
Explain what happens in text format?
Compare Hadoop 2 and Hadoop 3?
Mention what job does the conf class do?
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