Why does one remove or add nodes in a Hadoop cluster frequently?
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What is the purpose of context object?
Whats the default port that jobtrackers listens ?
Give examples of some companies that are using Hadoop structure?
Explain how can you debug hadoop code?
Is there another way to check whether Namenode is working?
Can we deploy job tracker other than name node?
What is replication factor?
Clarify what is sequence file input format?
What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?
Define a sequence file in hadoop?
What is pseudo-distributed mode?
What is the non dfs used?
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