What is the difference between authentication and authorization?
PICTURE THIS: RAG CHATBOT
Simple meaning
Authentication proves who you are, for example login with password or OTP.
WHY — Auth instead of guessing?
Why interviewers care about Auth:
contrast on Auth, not two memorised paragraphs.
the developer, then one case where picking wrong hurts.
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:
- 1Authentication proves who you
are, for example login with password or OTP.
- 2Authorization decides what you
may do, for example only the seller can edit this listing.
- 3How it works
A 401 is usually authn
- 4Give an example
a 403 is usually authz.
- 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
Authentication proves who you are, for example login with password or OTP. Authorization decides what you may do, for example only the seller can edit this listing.