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Does Hadoop requires RAID?
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Name the examples of some companies that are using hadoop structure?
Is secondary namenode a substitute to the namenode?
What happens to a namenode, when job tracker is down?
What are the steps to submit a Hadoop job?
Is it necessary to write jobs for hadoop in the java language?
What is the functionality of jobtracker in 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?
What problems can be addressed by using Zookeeper?
What are sink processors?
Define a namenode?
How many instances of a jobtracker run on hadoop cluster?
How we can change Replication factor when Data is on the fly?
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