Why use hadoop?
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What do you understand by a closure in scala?
What is check pointing in hadoop?
Explain the core methods of the reducer?
What is the relationship between Jobs and Tasks in Hadoop?
What does the high availability of a name-node means?
What is Federation?
What are the primary phases of the reducer?
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 do you understand by unit and ()in scala?
Explain small file problem in hadoop
Explain what is jobtracker in hadoop? What are the actions followed by hadoop?
What is rack awareness in hadoop?
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