System Design · Junior · Question 61 of 75

What is a health check endpoint for?

✓Correct answer: Letting load balancers and monitoring check that an instance is alive and ready to serve traffic
2Checking users' health data
3Running unit tests in production

Explanation

Unhealthy instances are taken out of rotation automatically. A good check also verifies critical dependencies cheaply.

Further reading

Wikipedia: Load balancing ↗

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