What are channel selectors?
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What is yarn in hadoop?
Name some companies that use Hadoop?
How indexing is done in HDFS?
What happens in a textinputformat?
What is unstructured data?
How to resolve small file problem in hdfs?
did you maintain the hadoop cluster in-house or used hadoop in the cloud?
Define tasktracker.
Explain why do we need hadoop?
How to enable/configure the compression of map output data in hadoop?
What is the best hardware configuration to run Hadoop?
Data Engineer Given a list of followers in the format:123, 345234, 678345, 123…Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?
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