What are the techniques to optimize a Spark job? This is a super important question for a Big data developer…
One of the most common interview questions in big data developer interviews. I was asked this question in almost all…
DAG – Directed Acyclic Graph A DAG comprises of edges and vertices, in which edges represent rdds and vertices represent…
Why RDD is immutable? What is the need of RDD in spark? RDD – Resilient Distributed Dataset What is…
Why the block is large in Hadoop? What is the use of having large block size in Hadoop? These…
What is ORC file format? How ORC is better than RC file format? ORC stands for Optimized Record Columnar…
Tell me something about Avro file format. What do you know about Avro files? These are the common question…
You may have come across questions like below during any of your spark interview. So to get full knowledge on…
Many of us might be thinking is really Java required for a Big Data/Spark/Data engineer interview? If yes, what all…
Similar and related questions: How do you cache dataset in Spark? How many ways to cache the data in Spark?…