How is HDFS fault tolerant?
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Define tasktracker.
Why are the number of splits equal to the number of maps?
Explain the use of tasktracker in the hadoop cluster?
How did you debug your Hadoop code ?
What is a heartbeat in HDFS?
Does the hdfs client decide the input split or namenode?
On which port does ssh work?
What is HDFS block size and what did you chose in your project?
Why do we need a password-less ssh in fully distributed environment?
Why the name ‘hadoop’?
What are the limitations of importing RDBMS tables into Hcatalog directly?
Have you ever used Counters in Hadoop. Give us an example scenario?