Can you give a detailed overview about the Big Data being generated by Facebook?
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What is a namenode?
Mention what job does the conf class do?
Can I set the number of reducers to zero?
Tell me some major benefits of Hadoop?
What is data cleansing?
What are the tools used in big data?
Are there any special requirements for namenode?
How many daemon processes run on a hadoop cluster?
If DataNode increases, then do we need to upgrade NameNode in Hadoop?
What is heartbeat in hadoop?
Explain the usage of Context Object?
What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?
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