Your question is Spark Architecture Deep Dive. 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).
Explain the key components of Apache Spark’s architecture, including what Spark executors and the Spark driver are, how they communicate, the difference between a DataFrame and an RDD, the main functions of the Spark Catalyst Optimizer, how Spark handles fault tolerance, and why lazy evaluation is beneficial.