What is your rollback strategy when a MERN release is bad?
PICTURE THIS: DATABASE INDEX
Simple meaning
Redeploy the previous known-good artifact rather than hotfixing forward under pressure.
WHY — CI/CD instead of guessing?
Why interviewers care about CI/CD:
who only read docs from people who shipped.
and tied to Full Stack work.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1Redeploy the previous known-good
artifact rather than hotfixing forward under pressure.
- 2Database migrations must be
backward compatible so the old API can still run.
- 3Feature flags let you
disable a path without a full rollback when the migration cannot reverse easily.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
Redeploy the previous known-good artifact rather than hotfixing forward under pressure. Database migrations must be backward compatible so the old API can still run.