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While starting hadoop services, datanode service is not running?
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What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
How would you check whether your NameNode is working or not?
In which location name node sores its metadata and why?
Is it possible to rename the output file, and if so, how?
What is the job tracker role in hadoop?
Can you explain indexing?
What happen if one of the datanodes has much slower cpu?
How can one check whether NameNode is working or not?
Can we change the file cached by distributed cache
What are the side data distribution techniques?
What is the best practice to deploy the secondary name node?
After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?
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