The If-Modified-Since header can be used to check whether a cached page is still valid. Requests can be made for pages containing images, sound, video, and so on, as well as HTML. Do you think the effectiveness of this technique is better or worse for JPEG images as compared to HTML?
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The If-Modified-Since header can be used to check whether a cached page is still valid. Requests can be made for pages containing images, sound, video, and so on, as well as HTML. Do you think the effectiveness of this technique is better or worse for JPEG images as compared to HTML?
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- The If-Modified-Since header can be used to check whether a cached page is still valid. Requests can be made for pages containing images, sound, video, and so on, as well as HTML. Do you think the effectiveness of this technique is better or worse for JPEG images as compared to HTML? Think carefully about what "effectiveness" means and explain your answer.This header may be used to determine if a cached page has been modified since it was last accessed. Requests may be made for pages that include pictures, sound, video, and other types of media, in addition to HTML. Do you believe that the efficacy of this approach is greater or worse when used to JPEG pictures as opposed to HTML code? Consider the definition of "efficacy" carefully, and then provide an explanation for your choice.Using example HTTP headers show the typical HTTP exchange between a Web Client (Browser, CURL, etc.) and a Web Server, where the client issues (i) a GET and (ii) a POST request via a HTML form containing three different HTML form fields (choose three from SUBMIT, TEXT, CHECKBOX, RADIO).
- What is the difference between the enhanced second-chance page-replacement algorithm and the FIFO page-replacement algorithm?Consider the bitmap representation of the free-space map, where for eachblock in the file, two bits are maintained in the bitmap. If the block is between0 and 30 percent full the bits are 00, between 30 and 60 percent the bits are01, between 60 and 90 percent the bits are 10, and above 90 percent the bitsare 11. Such bitmaps can be kept in memory even for quite large files. Outline the benefit of the bitmap technique over free lists in searching for free space and in updating free space information.Get and Post are wo different methods of HTTP in which information such as parameters of a form element can be sent from a browser to a web server. List three differences between two methods in a browser behavior when sending the information in those two methods. Write the answer in three comparisons in a, b, c as Get: a, b, c. POST: a, b, c.
- Consider the bitmap representation of the free-space map, where for eachblock in the file, two bits are maintained in the bitmap. If the block is between0 and 30 percent full the bits are 00, between 30 and 60 percent the bits are01, between 60 and 90 percent the bits are 10, and above 90 percent the bitsare 11. Such bitmaps can be kept in memory even for quite large files. Describe how to keep the bitmap up to date on record insertions and deletions.Consider the bitmap representation of the free-space map, where for eachblock in the file, two bits are maintained in the bitmap. If the block is between0 and 30 percent full the bits are 00, between 30 and 60 percent the bits are01, between 60 and 90 percent the bits are 10, and above 90 percent the bitsare 11. Such bitmaps can be kept in memory even for quite large files.a. Outline two benefits and one drawback to using two bits for a block,instead of one byte as described earlier in this chapter.b. Describe how to keep the bitmap up to date on record insertions anddeletions.c. Outline the benefit of the bitmap technique over free lists in searchingfor free space and in updating free space information.QUESTION 2: What is the difference between a Page and a Frame? QUESTION 3: Explain the differences between Resident Set Management and Page Replacement Policy.
- البيانات نظري MapReduce works on key-value pairs for input and output. Therefore, data is transformed into key-value pairs when written on HDFS Select one: True False Previous page Next Return to: Generalwrite a python program that reads from an imbedded XML file and retrieves elements and attributes (Solution: myxml.py, myxml2.py)What is the difference between a symbolic link and the destination file in terms of file size?