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"Hola" is a form of "hola", an interjection which is often translated as "hello". "Qué hay" is a phrase which is often translated as "what is there". Learn more about the difference between "hola" and "qué hay" below.
hola
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
1. (general)
b. hi (colloquial)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
¡Hola! ¿Qué hay de nuevo?Hi! What's new?
qué hay(
keh
ay
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. what is there
¿Qué hay para almorzar? Tengo antojo de una sopa.What is there for lunch? I'm craving soup.
b. what is available
¿Qué hay en línea para vuelos a New York?What is available online for flights to New York?
2. (salutation)