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What is a commodity hardware? Does commodity hardware include RAM?
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Name the files which are used by the startup and shutdown commands?
How to restart NameNode or all the daemons in Hadoop?
Can you explain combiner?
What is the NameNode port number?
Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?
If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?
Explain is it possible to search for files using wildcards?
While starting hadoop services, datanode service is not running?
What are the main components of hadoop?
What is the job tracker role in hadoop?
Ideally what should be the replication factor in hadoop?
How does speculative execution work in Hadoop?
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