what factors the block size takes before creation?
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Explain the master class and the output class do?
What are different hdfs dfs shell commands to perform copy operation?
What is the heartbeat used for?
What is the functionality of jobtracker in hadoop?
What is Derby database?
did you maintain the hadoop cluster in-house or used hadoop in the cloud?
What is nlineoutputformat?
Explain why do we need hadoop?
What exactly is hadoop?
What is the sequencefileinputformat in hadoop?
Explain how do ‘map’ and ‘reduce’ works?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?