python basics
module
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spark part-I
hadoop offers: hdfs: for storage mapreduce: for computation yarn: for resource management
scala part II
scala runs on top of jvm scala is like java so requires main, or we can extends App then we dont have to define main method
time complexity
A way to calculate time consumed by an algorithm, as a function of input.
scala part I
spark code can be written in different languages (scala, python, java, r), scala is hybrib, oops + functional.