How to use combiner in hadoop ?
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What is the problem with small files in Hadoop?
Can you define a checkpoint?
When we send a data to a node, do we allow settling in time, before sending another data to that node?
Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
What is the difference between TextinputFormat and KeyValueTextInputFormat class?
Explain how can we check whether namenode is working or not?
What is the command to change the replication factor ?
What sorts of actions does the job tracker process perform?
What is configured in /etc/hosts and what is its role in setting Hadoop cluster?
Explain Erasure Coding in Hadoop?
Why would nosql be better than using a sql database? And how much better is it?
Why slaves limited to 4000 in hadoop version 1?
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