Hadoop Interview questions


Total available count: 27
Subject - Apache
Subsubject - Hadoop

What is the transformation?

A transformation is a lazy operation on an RDD (Resilient Distributed Datasets) that returns another RDD, like flatMap, the map, reduceByKey, filter, join cogroup, etc. Transformations are unwilling to work or lazy and are not executed immediately, but only after an action has been executed.




Next 5 interview question(s)

1
What are the possible operations on RDD?
2
How do you define RDD?
3
How can you define SparkConf?
4
How do you define SparkContext?
5
Why both Spark and Hadoop needed?