Which online examination system can withstand a large number of concurrency without crashing?

This still depends on what the development company says. General concurrency can also be controlled, and you can also achieve your concurrency according to your needs. There should be hundreds of people, and more than 1000 should be enough. If there are more, you should consult. Let me show you the stress test of the reference excellent exam, which is used by thousands of people in our company.