CSSE4004 - Lecture 9

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Quiz by tb22, updated more than 1 year ago
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Created by tb22 over 6 years ago
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CSSE4004 - Lecture 9

Resource summary

Question 1

Question
In the Remote access model, accesses are done on the client and returned to the server once complete
Answer
  • True
  • False

Question 2

Question
Which of the following is false about NFS?
Answer
  • Uses the Remote access model
  • Originally designed to be stateless, but no longer stateless for performance reasons
  • All clients must see the same name if they can see same file
  • Uses sequence numbering to achieve fault tolerance

Question 3

Question
Which of the following is FALSE about distributed systems on the world wide web
Answer
  • Caching may occur both by browsers and proxies
  • Contend delivery networks are a form of replication
  • DNS has a global namespace
  • SOAP is increasingly replacing HTTP

Question 4

Question
What coordination model would be appropriate for a message which is referentially coupled by temporally uncoupled?
Answer
  • Mailbox
  • Direct
  • Meeting oriented
  • Generative communication

Question 5

Question
When would Meeting oriented coordination be appropriate?
Answer
  • Referentially uncoupled, Temporally coupled
  • Referentially uncoupled, Temporally uncoupled
  • Referentially coupled, Temporally coupled
  • Referentially coupled, Temporally uncoupled

Question 6

Question
Which of the following is FALSE
Answer
  • Both NFS and Coda use write-back cache consistency
  • In Coda, file IDs have a global scope
  • Client process in Coda are described as thin
  • Access transparency by unix systems is a major design goal of NFS

Question 7

Question
Which of the following is false about Java Jini?
Answer
  • Separates communication from synchronization
  • Based on Linda
  • Implements a distribute tuple space
  • Scales efficiently, allowing coordination to be used frequently

Question 8

Question
Which of the following is false about Coda?
Answer
  • Shared name space maintained across all clients
  • Locally cached files allow operation across failure
  • Supports disconnected operation, on reconnection resolves conflicts
  • Limited to about 100 workstations due to non-locking design
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