Your team deploys a new version of an e-commerce application. Five minutes later, some users report that checkout is failing with a 500 error. The application worked correctly in staging. What would you investigate first?, A user reports that they can't log in, but everyone else on the team can log in normally. You cannot reproduce the problem on your own computer. How would you try to reproduce and isolate the issue?, Your application is becoming increasingly slow, but there are no obvious errors in the UI. The problem only happens when traffic is high. What information would you look for to identify the root cause?, A developer tells you that they fixed a bug, but the same feature stopped working again after the latest release. How would you determine whether the new release introduced a regression?, Your team discovers that a new deployment is causing errors for 30% of users. The previous version was working normally. Would you try to fix the new version immediately or roll it back first, and why?, You find an error in the application logs, but the error message doesn't explain why the problem happened. What would you do next to form and test a hypothesis?, Your team cannot fix a payment integration before an important release, but you have found a temporary way to prevent users from losing their orders. Would you use a workaround? Why or why not?, A developer says, "The problem is the database because I saw a database error in the logs." However, you discover that another service was sending thousands of unnecessary requests to the database. What might be the difference between the symptom and the root cause in this situation?, A bug only happens on one customer's account. The customer's data is much larger than everyone else's. How would you investigate whether the amount or structure of their data is related to the bug?, Your team fixes a production bug, but nobody knows exactly why it happened. The application is working again, and everyone wants to move on. What should the team do before considering the incident completely finished?

Debugging and Troubleshooting - Discussion

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