Have you tested the system under high load?

Yes, I have conducted system testing under high load. This usually involves creating scenarios that simulate a large number of concurrent users or requests to the system to see how it handles peak loads. Tools such as JMeter, LoadRunner, or Locust can be used for this.

For example, with JMeter, you can set up a test that sends 1000 requests per second to an API and measures response time and error percentage. This helps identify bottlenecks and determine the system's maximum throughput.