Spark Paired RDD is nothing but an RDD that contains key, value pairs. Key-value pairs are linked data items. Keys…
How do you or can you create a Singleton class in Java? Design patterns are generalized solutions for common development…
Singleton Object Singleton objects are the objects that are defined using the keyword object before it and we don’t need…
Whole-Stage CodeGen is also known as Whole-Stage Java Code Generation, which is a physical query optimization phase in Spakr SQL…
One of the common questions in Spark interview. There is a lot about this Catalyst Optimizer. Here in this blog…
What is Bucketing? Why do we need Bucketing? How it is going to improve query performance? Bucketing Bucketing is…
Similar questions: How can we optimize a Hive job? As we deal with data of size terabytes and petabytes the…
Why do we need partitioning in Hive? What are the types of partitioning in Hive? Above are example questions that…
Most frequently asked interview question, when you say you have very good knowledge in Java. Below are similar questions: Can…
What are the techniques to optimize a Spark job? This is a super important question for a Big data developer…