Why do we use Hadoop?
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Define a combiner?
How can you connect an application
Which is the best hadoop certification?
What do you mean by taskinstance?
Where is the Mapper Output intermediate kay-value data stored ?
What do you know about keyvaluetextinputformat?
Explain the difference between NameNode
What is difference between regular file system and HDFS?
How to Administering Hadoop?
What is compute and Storage nodes?
What happens to job tracker when namenode is down?
What if rack 2 and datanode fails?