How can we check whether namenode is working or not?
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What do slaves consist of?
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how to share the metastore within multiple users?
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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Explain the basic architecture of Hadoop?
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Explain the benefits of block transfer?
Define a combiner?
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How indexing is done in HDFS?
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