Search the practice set
126 questions, 454 terms and 400 topics in 20 areas.
11 results for “SLI, SLO & SLA”
Service Level Indicator
The actual measurement of a service's behaviour that an objective is set against — a ratio of good events to valid events.
Burn Rate Alerting
Paging when the error budget is being consumed fast enough to matter, rather than when a component crosses a threshold.
Durability vs Availability
Two different storage guarantees — whether data survives, and whether it can be reached right now — routinely conflated because both are quoted in nines.
Error Budget
The amount of unreliability an SLO permits, treated as a resource that feature velocity spends.
Error Budget Policy
The written agreement about what happens when the error budget is exhausted, which is what turns an SLO from a number into a control.
Service Level Agreement
A contractual commitment about service level, with a defined remedy — usually a service credit — when it is missed.
Service Level Objective
An internal target for a service level indicator, set below the level at which users notice, and used to decide whether to ship or to stabilise.
The business asks for "100% uptime" for a new customer portal. Walk me through the conversation that ends in an agreed SLO.
What the interviewer is testing Whether you can run a negotiation that ends in a number both sides own, rather than either capitulating or lecturing about nines
A team is launching a new service and asks what its SLO should be. How do you help them decide, and why is "99.99%" usually the wrong first answer?
What the interviewer is testing Whether you treat reliability as a cost benefit decision with a budget, or as a virtue to maximise. Why not four nines It costs