What are traits in Scala, and how are they different from classes?
Python/Codingeasy
2
What is the difference between cache() and persist() in Spark? When would you use each?
Spark/Big Datamedium
3
What is the difference between groupByKey and reduceByKey in Spark?
Spark/Big Datamedium
4
What is the difference between narrow and wide transformations in Apache Spark? Explain with examples.
Spark/Big Datamedium
5
What is the difference between partitioning and bucketing in Spark, and when would you use bucketing?
SQLmedium
6
Can you explain the architecture of Apache Spark and its components?
Spark/Big Datahard
7
When would you architecturally choose Dataset[T] over DataFrame in a Scala Spark pipeline, and what are the scalability and portability trade-offs? Include type-safety benefits vs. operational constraints.
Spark/Big Dataeasy
8
Can you explain your experience with Jenkins in your project?
Cloud/Toolseasy
+20 More Questions with Expert Answers
Get the complete 1,800+ question library with detailed, expert-level answers covering SQL, Spark, System Design, Python, Cloud, and Behavioral topics.