Clarify what a task tracker is in hadoop?
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Whats the default port that jobtrackers listens ?
What are the important features of hadoop?
Explain in which directory hadoop is installed?
What is the difference between a hadoop database and relational database?
How often do you need to reformat the namenode?
What are the port numbers of task tracker?
What is LazyOutputFormat in Hadoop?
Explain the common input formats in hadoop?
What are the differences between hadoop 1 and hadoop 2?
What is the use of recordreader in hadoop?
What is TextInputFormat in Hadoop?
What is Identity reducer?
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