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Apache Hadoop (394) - MapReduce (354)
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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?
748How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?
695Write a Hive UDF that returns a sentiment score. For example, if good = 1, bad = -1, and average = 0, then a review of a restaurant states "Good food, bad service," your score might be 1 - 1 = 0.
687Suppose that your data is stored in collections, for instance, some binary data, message data or metadata is all keyed on the same value. Will you use HBase for this?
158
Explain Sort Order in brief?
What is a rack awareness algorithm and why is it used in hadoop?
Is spark based on hadoop?
What are the main features of impala?
What is the purpose of sqoop-merge?
Main Components of Hadoop?
How is NFS different from HDFS?
What are the three types of tombstone markers in hbase?
Define streaming access?
How do you write your own SerDe?
What is the default block size in hdfs?
What is the use of spark?
What are the different pig data types?
What is Starvation scenario in spark streaming?
Why ‘Reading‘ is done in parallel and ‘Writing‘ is not in HDFS?
