What are the meanings of and how do you respond to the following Spanish greetings?

Question

For Native Speakers and Those who have lots of experience speaking with native speakers only, please.

Que pasa?
Que hay?
Que hubo?
Que onda?

Answer 1

All those means the same and it´s like you saying in english "what's up?" is just that we here in Mexico have many ways to ask the same thing, is part of our slang.

When somebody ask you that, you just answer:

"aqui nomás" (just here)
"nada" (nothing)
"pues con la novedad de..." (well... i have news about..)
"equis" ("X" this is used a lot for the young people here in mexico, and is like saying nothing bad, nothing good)

Trust me i live in Mexico and I use those questions all the time, and also the answers...

Have a nice day

Answer 2

I'm a 'native speaker' so how I normally respond to these greetings is basically repeating what they just said to me and adding something like 'nada, aqui nomas'...basically meaning ' nothing much, just here'

Answer 3

Just by themselves all of them mean "what's up".

The answer is either the same sentences or "nada especial" or something of the sort.

Or maybe something really interesting happened so this is the moment to talk about it.
.

Answer 4

The safest answer is probably: "Muy bien, gracias, y tu?" That puts it back on the questionner.

Answer 5

I'm also interested in the answer to this, but you forgot one:

Que tal?