How do you defend login endpoints against brute force?
PICTURE THIS: STACK VS QUEUE
Simple meaning
Rate-limit by IP and account, add backoff, and consider CAPTCHA after failures.
WHY — Security instead of guessing?
Why interviewers care about Security:
question about Security.
trade-offs, and what you would actually do on a Full Stack project - not buzzwords.
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:
- 1Rate-limit by IP and
account, add backoff, and consider CAPTCHA after failures.
- 2Why it exists
Log and alert on spikes.
- 3Lockouts should avoid turning
into a denial-of-service against a victim email.
- 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
Rate-limit by IP and account, add backoff, and consider CAPTCHA after failures. Log and alert on spikes.