Explain the basic architecture of Hadoop?
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What is speculative execution in Hadoop?
what are Task Tracker and Job Tracker?
What is a 'block' in HDFS?
How to resolve small file problem in hdfs?
What is the Use of SSH in Hadoop ?
What is Distributed Cache?
What is safe mode in Hadoop?
Rack awareness of Namenode?
Which are the two types of 'writes' in HDFS?
How can we check whether namenode is working or not?
What does job conf class do?
Explain the use of tasktracker in the hadoop cluster?
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