Where do you specify the Mapper Implementation?
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Can NameNode and DataNode be a commodity hardware?
What is the default block size in hdfs?
Name the examples of some companies that are using hadoop structure?
How did you debug your Hadoop code ?
What is the meaning of speculative execution in Hadoop? Why is it important?
Is hadoop open source?
Explain the difference between NameNode
What are the most commonly defined input formats in Hadoop?
How to enable/configure the compression of map output data in hadoop?
Did you ever ran into a lop sided job that resulted in out of memory error
How many maximum jvm can run on a slave node?
what is the default replication factor in HDFS?
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