TU Wien:Advanced Internet Computing VU (Dustdar)/Prüfung 2019-03-14

Side exam WS18

60 minutes, closed book

1. Describe the difference between functional and non-functional properties
2. Meaning of loosely coupled and stateless web services?
3. Single choice questions (no deductions for wrong answers)
   • Do BPEL-scopes define variable visibility within the process? Y/N
   • ? Y/N
   • ? Y/N
   • ? Y/N
   • ? Y/N
4. Why do you need MEPs when using WSDL2.0?
5. REST
   • Describe "Safe" HTTP methods, name one example
   • Describe "Idempotent" HTTP methods, name one example
   • What is OPTIONS intended for?
   • Describe at least three tasks that can be done by an ESB
6. Why would you as a provider use virtual machines instead of actual hardware machines?
7. Describe the difference between orchestration or choreography
8. Calculations - given Max values ~ A=100ms,B=200ms,C=300ms,D=400ms,E=500ms, B and C may run in parallel, what is the expected value?
9. Write down the theoretical speedup of a system processing tasks in parallel (task can be parallelized by 60%, 5 CPUs are available)
10. Example given (volatile computation demand for video surveillance, minimize cost), which cloud products would you use and why