Your question is Spark Join Strategies and Caching. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Spark architecture and join strategies: explain how Spark chooses and executes join strategies, and when to use caching, in the context of streaming and declarative pipelines
Asked in the Round 3 - technical domain stage. Author: 'streaming related questions, spark related question based on architecture, declarative pipelines, cache, join strategies.'