What is commodity hardware?
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Explain the features of pseudo mode?
Give the use of the bootstrap panel.
What is the use of Combiner?
What is Writable & WritableComparable interface?
What happens to job tracker when namenode is down?
What do sorting do?
How the HDFS Blocks are replicated?
Explain the core components of hadoop?
How does NameNode tackle DataNode failures?
Explain the hadoop configuration files at present?
How the Client communicates with HDFS?
Explain a simple Map/Reduce problem.
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