Free Databricks-Certified-Associate-Developer-for-Apache-Spark-3.5 Actual Exam Questions - Question 14 Discussion
What is the role of the driver node?
D imo, B and C are clearly incorrect since the driver does way more than just UI or local computations. D is also wrong because the driver doesn’t store final results; it coordinates execution, so A fits best.
It’s A. The driver node is definitely the one that breaks down actions into tasks and schedules them on the workers. B’s just wrong because it’s more than monitoring. C is off since the driver doesn’t hold the data or run all computations itself. D’s not accurate either because the driver doesn’t store results after workers finish; it coordinates the whole thing. So yeah, “orchestrates” pretty much sums up scheduling plus sending tasks out.
D imo, the driver node is definitely in charge of breaking down the job and assigning tasks to workers, not just acting as a UI or storing results. C can be ruled out since the driver doesn’t hold all the data or do all computations itself—that’s the workers’ role. The main responsibility is to manage and coordinate the execution flow, which matches option A perfectly.
A for sure, the driver manages tasks and coordinates workers directly.
B tbh, the driver does way more than just UI—it coordinates but doesn't actually perform computations or store results itself. So B is too limited compared to A, which sounds more accurate here.
A vs D? I’m ruling out D because the driver doesn’t store the final results—it’s more about managing and coordinating. The workers handle the heavy lifting of computation and storage. So A fits better since the driver’s job is to orchestrate the execution and send tasks out to workers.
Option A, the driver manages task distribution and job orchestration.
A The driver node’s main job is coordinating the whole Spark job. It breaks down the application into tasks and sends them out to worker nodes. It doesn’t just hold data or act as a UI, and it’s not where the final results are stored either—that’s done by the workers after processing.
A. The driver node orchestrates execution and distributes tasks to workers. It’s the main coordinator, not just a UI or data holder.