What are the functionalities of jobtracker?
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What is the meaning of speculative execution in Hadoop? Why is it important?
Can NameNode and DataNode be a commodity hardware?
What are sink processors?
How to configure hadoop to reuse JVM for mappers?
What is the best hardware configuration to run Hadoop?
What is output format in hadoop?
How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?
Mention what is the number of default partitioner in Hadoop?
What are the characteristics of hadoop framework?
how can we change Replication Factor?
What does job conf class do?
How the HDFS Blocks are replicated?
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