What is JobTracker?
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Why do we need Hadoop?
What is namenode?
What happens if you get a ‘connection refused java exception’ when you type hadoop fsck /?
Explain some important features of hadoop?
What is KeyValueTextInputFormat in Hadoop?
How Hadoop’s CLASSPATH plays a vital role in starting or stopping in Hadoop daemons?
Can I set the number of reducers to zero?
What is Mapper in Hadoop?
What are the features of Pseudo mode?
What is the difference between TextinputFormat and KeyValueTextInputFormat class?
Where is hadoop-env.sh file present?
What is Fault Tolerance?
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