Which operating system(s) are supported for production hadoop deployment?
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What is the job tracker role in hadoop?
Define a udf?
What does rack awareness algorithm means and why is it utilized as a part of hadoop?
What are the functionalities of jobtracer?
Can we deploy job tracker other than name node?
Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?
Define “speculative execution” in hadoop?
What is meant by streaming access?
Explain in which directory hadoop is installed?
What is the default replication factor and how will you change it?
What is Reducer in Hadoop?
What are the core components of Hadoop?
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