How many instances of a jobtracker run on hadoop cluster?
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What is the purpose of DataNode block scanner?
Explain the hadoop configuration files at present?
Explain what is sqoop in Hadoop ?
What is a 'block' in HDFS?
Does google use hadoop?
What is Hadoop?
What will you do when NameNode is down?
What is Row Key?
What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?
What is the relation between job and task in hadoop?
How can we check whether namenode is working or not?
What is the difference between hadoop and other data processing tools?
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