Explain Isolate and event loops in Dart.

Dart executes code in a single thread called an Isolate, which has its own memory heap and event loop.

Unlike threads in Java/C++, Isolates do not share memory. They communicate by passing messages through Ports. The event loop continuously processes two queues: the Microtask queue (high priority) and the Event queue (timers, I/O). Async code simply schedules execution on the event loop, avoiding blocking the main UI Isolate.