Explain why making some replica managers read-only may improve the performance of a gossip
system.
What will be an ideal response?
First, read operations may be satisfied by local read-only replica managers, while updates are processed by just
a few other replica managers. This is an efficient arrangement if on average there are many read operations to
every write operation. Second, since read-only replicas do not accept updates, they need no vector timestamp
entries. Vector timestamp sizes are therefore reduced.
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Which of the following statements is false?
a. Variables declared in the body of a particular method are local variables and can be used only in that method. b. A method’s parameters are local variables of the method. c. Every method’s body is delimited by left and right braces ({ and }). d. Keyword null indicates that a method will perform a task but will not return any information.
When selecting authentication types for an RAS server, what is considered to be the most secure authentication type?
A. Challenge Handshake Authentication Protocol B. Extensible Authentication Protocol C. Microsoft Challenge Handshake Authentication Protocol v2 D. Password Authentication Protocol