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How many maps are there in a particular job?
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What does jps command do in Hadoop?
Which port does SSH work on?
What is a udf?
Why do the nodes are removed and added frequently in a hadoop cluster?
Whats the default port that jobtrackers listens ?
When we send a data to a node, do we allow settling in time, before sending another data to that node?
Mention how hadoop is different from other data processing tools?
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Is Namenode machine same as DataNode machine as in terms of hardware in Hadoop?
If DataNode increases, then do we need to upgrade NameNode in Hadoop?
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