Mention what is the data storage component used by hadoop?
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What is a commodity hardware? Does commodity hardware include RAM?
What are the differences between hadoop 1 and hadoop 2?
What does secondary name-node means?
What happens if the number of reducers is 0 in Hadoop?
Explain what is a task tracker in hadoop?
Explain how can you debug hadoop code?
How job tracker schedules an assignment?
What is Combiner in 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?
How many datanodes can run on a single Hadoop cluster?
Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?
Is Namenode machine same as DataNode machine as in terms of hardware?
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