# How can you implement fault injection in Istio?

Istio, Medium (Advanced), Traffic Management. https://k8wiz.com/uquiz/how-can-you-implement-fault-injection-in-istio

- A. By manually introducing errors in your application code
- B. By using VirtualService to inject delays or aborts
- C. By using a separate fault injection service
- D. By modifying the Envoy proxy directly

**Answer:** By using VirtualService to inject delays or aborts

**Explanation:** Fault injection in Istio is implemented by using VirtualService to inject delays or aborts. This allows you to test the resilience of your services by simulating failures without modifying your application code.