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What is the non dfs used?
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After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?
Why we use intwritable instead of int? Why we use longwritable instead of long?
What is Mapper? How can we compress Mapper output in Hadoop?
Mention what are the three modes in which hadoop can be run?
Define “speculative execution” in hadoop?
What are the four modules that make up the Apache Hadoop framework?
Why Hadoop performs replication, although it results in data redundancy?
What happens if you don?t override the mapper methods and keep them as it is?
Which operating system(s) are supported for production hadoop deployment?
How to debug Hadoop code?
Explain what is a task tracker in hadoop?
What is TaskTracker?
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