How does speculative execution work in Hadoop?
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Explain small file problem in hadoop
What are input format, input split & record reader and what they do?
Clarify what a task tracker is in hadoop?
How will you write a custom partitioner for a Hadoop job?
If DataNode increases, then do we need to upgrade NameNode?
Explain how Hadoop cluster hardware planning and provisioning is done?
What are the tools used in big data?
Clarify how job tracker schedules an assignment?
Can you explain rack awareness?
What are the important features of hadoop?
Why use hadoop?
Mention how many inputsplits is made by a hadoop framework?
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