Define a daemon?
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What is IdentityMapper?
What platform and java version are required to run hadoop?
Can NameNode and DataNode be a commodity hardware?
What does ‘jps’ command do?
What is the difference between Hadoop and Traditional RDBMS?
what is the default replication factor in HDFS?
Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?
What is Disk Balancer in Apache Hadoop?
What happens in a textinputformat?
What are the hadoop's three configuration files?
what is SPF?
what are Task Tracker and Job Tracker?