How to determine method names and parameters in wsdl web service

yes you can find it. Go here and click on method which parameters you want to see. in this example

GetISBNInformation is the method click on it and you will get SOAP_ACTION and parameters. everything you need to know to send request using KSOAP. Cheers.

this should help out (php):

$client = new SoapClient("http://my_exposed_url?wsdl");
var_dump($client->__getFunctions());    
var_dump($client->__getTypes());