How Mapper is instantiated in a running job?
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What is formatting of the dfs?
How many Daemon processes run on a Hadoop system?
Explain the use of tasktracker in the hadoop cluster?
What is inputsplit in hadoop? Explain.
What is Derby database?
What is HDFS Block size? How is it different from traditional file system block size?
What does job conf class do?
What Mapper does?
Which files are used by the startup and shutdown commands?
what is a datanode?
How hdfa differs with nfs?
What is Hadoop serialization?
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