what’s up と it’s ok　の意味を教えてください。

whats up..... informal...is used for "how are you?". It means..... how are you but also, is anything new? So you can answer usually with "nothing much" or some kind of interesting news.
eg. Ken: What’s up Kumi?
Kumi: Not much. You?
Ken: Not much.

or...
Ken: What’s up Kumi?
Kumi: I just moved into a new apartment.
Ken: Really? How is it?
Kumi: It’s great. What’s up with you?

It’s ok... means 大丈夫　or まあまあ　or 心配しないで　or 良いですよ　or 別に　or びみょう.

now-please tell me all the meanings of びみょう..... or すごい　then you will understand how "it’s ok" can mean sooooo many things.