29 of 55.

In client mode, the driver runs on the same machine that submitted the job (often a developer’s workstation). If the driver has insufficient memory or CPU, it becomes a bottleneck.

Solution: Run the job in cluster mode.

In cluster mode, the driver runs inside the cluster on a worker node, benefiting from distributed cluster resources and improved performance for large workloads.

Why the other options are incorrect:

B: Executors handle tasks, not driver overhead.

C: May help temporarily but doesn’t scale; cluster mode is best practice.

D: Local mode runs everything on one JVM — worse for large workloads.