What happen if one of the datanodes has much slower cpu?
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Explain InputSplit in Hadoop?
What is the NameNode port number?
What sorts of actions does the job tracker process perform?
What is TaskTracker?
What are the Hadoop features extended to its eco-system components ?
Explain Erasure Coding in Hadoop?
Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?
How can one write custom record reader?
How can you set an arbitrary number of mappers to be created for a job in Hadoop?
What are the benefits yarn brings in to hadoop?
List Hadoop’s three configuration files?
What do you think about the speculative execution?
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