System Design · Senior · Question 29 of 75
What is an error budget?
- ✓Correct answer: The allowed share of failures under the SLO that can be "spent"
- 2The amount of money allocated to fixing bugs per quarter
- 3The maximum number of open issues in the bug tracker
Explanation
With a 99.9% SLO, the budget is 0.1% failed requests. While budget remains, the team ships features; when it's exhausted, the focus shifts to reliability. This makes reliability a measurable trade-off rather than an argument.