TU Wien:Advanced Internet Computing VU (Dustdar)/Prüfung 2019-01-11

Main exam WS18

60 minutes, closed book

1. Sketch the SOA triangle (including descriptions)
2. What is an Enterprise Application Integration adapter, what are its disadvantages, how can you make it better?
3. Multiple choice questions (no deductions for wrong answers)
   • Is availability an aggregated, serverside QoS attribute for web services? Y/N
   • Workflow models implement real-world process models Y/N
   • Web Services are by design tightly coupled
   • The APIs of REST components are usually external
   • BPEL, WSDL and SOAP are encoded/transmitted with JSON
4. Public / private / hybrid cloud: Explain in 1 sentence respectively and give 2 advantages per cloud model
5. Calculate availability value (no numbers, formula has to be written down) for 1 load balancer, 3 web servers, 5 db servers
6. Service-based integration and discovery
   • Describe at least three tasks that can be done by an ESB
   • What is HATEOAS
7. From a cloud centric perspective
   • Sketch and explain: Edge/cloud hybrid infrastructure with IoT devices
   • Explain: Horizontal and Vertical offloading (you can use the sketch from subquestion above)
8. Challenges of autonomous service composition (at least 3)
9. Example given (DNA analysis that will take >1 year, minimize cost), would you use EC2 On-demand, Reserved, Spot or Dedicated instances?