Yes, they will be notified that you have blocked them. It's a bit of an odd sequence though, watching someone's story and then immediately blocking them. But Instagram (assuming we're talking about Instagram here) is set up to let the blocked person know that they can no longer interact with you.
No, they won't be notified that you blocked them just because you watched their story before blocking. Blocking is a private action on your part and the platform usually doesn't send such a notification.
Nope. Blocking is a pretty final action on most social media platforms. When you block someone after watching their story, it's like you're erasing your digital footprint as far as they're concerned. So, they won't be able to tell that you viewed their story. Their access to any information about you is restricted, and that includes the view on their story.
Well, when you block someone, it's like you're severing all the ties between you two on the platform. They no longer have the ability to see any of your actions, including if you watched their story. The system restricts their access to any information about you. So, in conclusion, no, they cannot see that you watched their story after you've blocked them.
It can be considered rude. When you watch someone's story, they might think you're interested in their content or at least engaged. Blocking right after gives the impression that you didn't like what you saw but still peeked, which can seem a bit underhanded.
In most cases, no. When you block someone on Instagram, they are restricted from viewing your stories. This is a privacy feature to give you control over who sees your content.
Most of the time, no. When you block someone's story, it's not made obvious to them. It's a way for you to control your own viewing experience without the other person being directly informed. However, they might notice if they can't see you viewing their stories or interacting with them in the way they expect over time, but there's no specific 'you've been blocked from story' notification.