What is version-id mismatch error in hadoop?
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How do you define "block" in HDFS?
How to restart Namenode?
Which are the two types of 'writes' in HDFS?
What is a Task instance in Hadoop? Where does it run?1
What is the difference between a Hadoop and Relational Database and Nosql?
What are the most commonly defined input formats in Hadoop?
What is structured data?
Explain a simple Map/Reduce problem.
What are the port numbers of namenode, job tracker and task tracker?
Rack awareness of Namenode?
Explain the features of pseudo mode?
What is the purpose of dfsadmin tool?
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