What are the port numbers of task tracker?
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What are input format, input split & record reader and what they do?
Mention what are the most common input formats defined in hadoop?
Why we use intwritable instead of int? Why we use longwritable instead of long?
What are the different modes in which we can configure/install Hadoop?
Explain how do you overwrite replication factor?
After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?
In which directory hadoop is installed?
Is there another way to check whether Namenode is working?
How is the splitting of file invoked in Hadoop framework?
What do you know about the speculative execution?
What are the configuration files in Hadoop?
Ideally what should be the block size in hadoop?
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