Are job tracker and task trackers present in separate machines?
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How many maps are there in a particular job?
Explain what is storage and compute nodes?
What is the hadoop-core configuration?
How often do you need to reformat the namenode?
Can you give some examples of Big Data?
If DataNode increases, then do we need to upgrade NameNode in Hadoop?
What a task tracker is in hadoop?
What is Distributed Cache in Hadoop?
What is the role of the secondary namenode?
Suppose hadoop spawned 100 tasks for a job and one of the tasks failed. What will hadoop do?
What is Rack Awareness? What is its need in Hadoop?
What is purpose of RecordWriter in Hadoop?
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