Simple synchronized question

Hi,

let's say I have this :

class A {
     public synchronized void a() {
     }
     public synchronized void b() {
     }
}

will the requests queue up for each method, or for the class ?

I mean : if two requests want to access method b, one will access and other requests will be in a queue.
What happen if one request want to access a and another want to access b at the same time ?

Tthe synchronized keyword  bears upon the method or the whole class ?