How many global executors exist to run tasks in the Mule 4 runtime?

• A. 4
• B. 2
• C. 5
• D. 3

Answer: (D)

Mule 4 uses separate thread pools called global executors to run work, and there are three of them by default. One handles the general, non-blocking processing of flows and processors. A second is dedicated to blocking operations (like long-running IO or database calls) so they don’t block the main pool and slow everything else. The third is for scheduled tasks and time-based triggers, giving those tasks their own pool so scheduling doesn’t interfere with normal processing. This separation keeps throughput high and avoids starvation, so the runtime effectively has three global executors.