How do you use the [TestInitialize] and [TestCleanup] attributes?

Short answer: [TestInitialize] runs code before each test method to set up prerequisites. [TestCleanup] runs after each test method to clean up resources. [TestInitialize] public void Setup() { /* setup code */ } [TestCleanup] public void Cleanup() { /* cleanup code */ }

Real-world example (ShopNest)

ShopNest unit tests cover pricing and discount rules so a bad coupon change fails in CI before customers see it.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.