Can you explain sequence file in hadoop?
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Can we change the file cached by distributed cache
How to create the directory when name node is in safe mode?
Mention how many inputsplits is made by a hadoop framework?
What happens if you get a ‘connection refused java exception’ when you type hadoop fsck /?
What are the restriction to the key and value class ?
After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?
What are the benefits yarn brings in to hadoop?
What are the hadoop configuration files at present?
What are the side effects of not running a secondary name node?
Are there any special requirements for namenode?
What is Identity reducer?
What is Mapper? How can we compress Mapper output in Hadoop?
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