The WCF service WSDL is at http://venus.sod.asu.edu/WSRepository/Services/RandomStringSVC/Service.svc
It has two methods:
(1)string GetRandomString0();
      which returns a random string of length between 4 and 20
(2) string GetRandomString(string Length);
      which returns a random string of the given length.

 

About

This example is from the textbook
SERVICE-ORIENTED COMPUTING AND SYSTEM INTEGRATION
IoT, Big Data, and AI as Services, 8th edition, Kendall Hunt Publishing, 2022
by YINONG CHEN and GENNARO DE LUCA
For more Information: http://www.public.asu.edu/~ychen10/book/socsi.html