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What is Derby database?
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Define a task tracker?
What problems can be addressed by using Zookeeper?
Why is Apache Spark faster than Apache Hadoop?
If a data Node is full how it's identified?
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?
How do you define "block" in HDFS?
What is HDFS Block size? How is it different from traditional file system block size?
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What are the core components of Apache Hadoop?
How a task is scheduled by a jobtracker?
What are the different methods to run Spark over Apache Hadoop?
Explain the benefits of block transfer?
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