No, there is no way of knowing who has viewed your profile.
No, there is no way to tell who has viewed your tweets.
There is no way of knowing who has visited your profile/read your tweets.
No, that's why stalkers are thankful to twitter for they can view a person's tweets/profile freely unless their tweets are protected.
There is no way to tell who has looked at your profile. If you see someone posting about how they can see who viewed theirs, it is fake.
You can't. People who view your profile, it'll just add a count to your 'Profile Views' but you wouldn't know who viewed it.
you can tell by seeing the views increase
The only way to tell is by looking at their profile to see if they are currently tweeting. There is no "online" status or symbols.
How do you look at people on twitter
No, there is no way of knowing who views your profile.