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Is hadoop required for data science?
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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?
Rack awareness of Namenode?
What is output format in hadoop?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
What does /var/hadoop/pids do?
What problems can be addressed by using Zookeeper?
How a task is scheduled by a jobtracker?
What is the difference between traditional RDBMS and Hadoop?
How can we check whether namenode is working or not?
How blocks are distributed among all data nodes for a particular chunk of data?
Explain the wordcount implementation via hadoop framework ?
what are Task Tracker and Job Tracker?
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