How does caching improve the performance of a Web browser? Does caching reduce the number of interactions that take place between the browser and the Web server?
What will be an ideal response?
When a page or image is first downloaded, it is stored in a temporary directory on the user's computer. The next time that page or image is requested, the browser first checks
to see if it has a copy stored locally in the cache, and, if so, whether the copy is up-to-date (this is accomplished by contacting the server and asking how recently the page was changed). If an up-to-date copy is stored locally, then the browser can display this copy, instead of downloading the original. Caching can make downloading a new copy unnecessary, but it still requires a check to see if the cached page is up-to-date.
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Which of the following logical units of a computer represents the “administrative” section?
a. Input unit. b. Output unit. c. Central processing unit. d. Memory unit.
All comments in a document, regardless of who made them, are set to the same color
Indicate whether the statement is true or false
In the Round function, if you leave the precision level blank, Access will default to how many decimal places?
A. 0 B. 1 C. 2 D. You cannot leave the precision level argument blank.
When trying to improve performance of a slow system, you notice in Task Manager that the superfetch service is using a high percentage of CPU time. What is your next best step?
a. Disable superfetch to improve performance. b. Update Windows to improve superfetch performance. c. Superfetch is an essential Windows process and should not be disabled. Move on to other solutions to improve performance. d. Ask the user if he uses the superfetch service. If he doesn't, uninstall it.