How to come out of the insert mode?
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Define a daemon?
Is map like a pointer?
What is high availability in hadoop?
Explain the basic difference between traditional rdbms and hadoop?
How many instances of a jobtracker run on hadoop cluster?
What is the main purpose of HDFS fsck command?
what is SPF?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
What is a 'block' in HDFS?
How does NameNode tackle DataNode failures?
What is HDFS High Availability?
Name some companies that use Hadoop?
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