Clarify what a task tracker is in hadoop?
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How namenode handles data node failures?
What is a namenode?
What are the four basic parameters of a mapper?
How to restart NameNode or all the daemons in Hadoop?
How does hadoop achieve fault tolerance?
Explain some important features of hadoop?
Where are hadoop’s configuration files located and list them?
Do we need to place 2nd and 3rd data in rack 2 only?
Where are Hadoop’s configuration files located?
We have already sql then why nosql?
What is the NameNode port number?
What are some typical functions of Job Tracker?
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