Haskell - Is effect order deterministic in case of Applicative?

Question

When executing the IO action defined by someFun <$> (a :: IO ()) <$> (b :: IO ()), is the execution of the a and b actions

Answer 1

For the IO Applicative, this is certainly the case. But check out the async package for an example of an Applicative where in f <$> a <*> b the effects of a and b happen in parallel.