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Explain how can we check whether namenode is working or not?
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Explain Hadoop streaming?
Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?
Why cloudera is used?
What is Mapper? How can we compress Mapper output in Hadoop?
Ideally what should be the replication factor in hadoop?
If the hadoop administrator needs to make a change, which configuration file does he need to change?
Which directory does hadoop install to?
Whats the default port that jobtrackers listens ?
Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?
What is Slot in Hadoop v1? Why was it removed from Hadoop v2?
Why use hadoop?
What is streaming in Hadoop?
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