System Design · Junior · Question 40 of 75
What is a single point of failure?
- ✓Correct answer: A component whose failure brings down the whole system
- 2A place in the code where all of the app's errors are handled
- 3The server that stores the database backup
Explanation
For example, a single database without replicas or a single server without a load balancer. It's eliminated through redundancy: multiple instances, replicas, different availability zones. On the frontend, the analogue is a whole page depending on one third-party script.