What are the functionalities of jobtracker?
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Why do we use HDFS for applications having large data sets and not when there are lot of small files?
Are Namenode and job tracker on the same host?
How is the option in Hadoop to skip the bad records?
What is the InputFormat ?
Have you ever used Counters in Hadoop. Give us an example scenario?
What are channel selectors?
shouldn't DFS be able to handle large volumes of data already?
What is the purpose of DataNode block scanner?
explain Metadata in Namenode?
What is HDFS ? How it is different from traditional file systems?
what is meaning Replication factor?
Explain the core components of hadoop?
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