2905386
Questão 1
Questão
In the Remote access model, accesses are done on the client and returned to the server once complete
Responda
- True
- False
Questão 2
Questão
Which of the following is false about NFS?
Responda
-
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
Questão 3
Questão
Which of the following is FALSE about distributed systems on the world wide web
Responda
-
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
Questão 4
Questão
What coordination model would be appropriate for a message which is referentially coupled by temporally uncoupled?
Responda
-
Mailbox
-
Direct
-
Meeting oriented
-
Generative communication
Questão 5
Questão
When would Meeting oriented coordination be appropriate?
Responda
-
Referentially uncoupled, Temporally coupled
-
Referentially uncoupled, Temporally uncoupled
-
Referentially coupled, Temporally coupled
-
Referentially coupled, Temporally uncoupled
Questão 6
Questão
Which of the following is FALSE
Responda
-
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
Questão 7
Questão
Which of the following is false about Java Jini?
Responda
-
Separates communication from synchronization
-
Based on Linda
-
Implements a distribute tuple space
-
Scales efficiently, allowing coordination to be used frequently
Questão 8
Questão
Which of the following is false about Coda?
Responda
-
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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