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What is Mapper in Hadoop?
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More Hadoop General Interview Questions
How ordering in hdfs is finished?
How namenode handles data node failures?
What happen when namenode enters in safemode in hadoop?
If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?
What happen if one of the datanodes has much slower cpu?
Explain what is speculative execution?
Give me examples of unstructured data?
What is LazyOutputFormat in Hadoop?
How to create the directory when name node is in safe mode?
What are the tools used in big data?
Explain the core methods of the reducer?
What are the hadoop configuration files at present?
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