How ordering in hdfs is finished?
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When and how to create hadoop archive?
What does the mapred.job.tracker command do?
Explain what is a sequence file in hadoop?
What are the different commands used to startup and shutdown Hadoop daemons?
What is Rack Awareness? What is its need in Hadoop?
What is hadoop? Name the main components of a hadoop application?
Name the operating system(s) which are supported for production hadoop deployment?
What are the benefits yarn brings in to hadoop?
What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?
What is the purpose of context object?
Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?
What do you understand by unit and ()in scala?
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