What is the difference between ViewBag and TempData?
PICTURE THIS: A REST CALL
Simple meaning
ViewBag lasts for one request to the view.
WHY — HTTP instead of guessing?
Why interviewers care about HTTP:
contrast on HTTP, 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:
- 1ViewBag lasts for one
request to the view.
- 2TempData survives one redirect
using session.
- 3I use TempData for
success messages after POST-redirect-GET.
- 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
ViewBag lasts for one request to the view. TempData survives one redirect using session.