6) RPC, remote procedure calls, enable service and software on one computer to u

Question

6) RPC, remote procedure calls, enable service and software on one computer to use services and software on a different computer. The group responsible of architecture structure in these cases is the Object Management Group (OMG) formed in 1989, the intent was to encourage the adoptions of distributed object systems in order to gain the benefits of object - oriented programming for software development. One of their systems that advocated the use of open systems was the Common Object Request Broker Architecture (CORBA) What are the main components of CORBA’s language - independent RMI framework?

7) We b Services is a major component of cloud computing, A web - service is a self - describing, self - contained software module available via a network, such as the internet. We have all heard of web based applications and use them every day in accessing the intern et. What are the difference s between web services and web applications?

8) Explain what Pervasive computing mean ? Give an example of how it is used and what environment is its domain.

9) Explain the differences between a page file and a swap file. Give an e xample of both, how they are used and what are the conditions in which they are used. What is the relationship between a swap file, a page file and virtual memory.

10) Of the major operating systems today and after taking this course, Between Microsoft, Apple and Linux, which do you like best and why ?

11) Explain the Disadvantages of Cloud Based computing in comparison to Server Hardware enclosed in a company’s Intranet.

Explanation / Answer

6) 1)an interface definition language known as IDL.2) Interoperability 3)the container programming model 4)language mapping 5)euivalent executor interface

7) a web application is an applicationthat is accessed through a web browser running on clients machine where as web service is a system of software that allows different machines to interact with each other through a network. Most of the times web services do not necessarily have a user interface since it is used as a component in an application, while a web application is a complete application with GUI. Further more webservice can be used to communicate or transfer data between web application that are running on different platforms.

8) pervasive computing, also called ubiquitous computing , is the growing trend of embedding computational capability(generally in the form of microprocessors) into every day objects to make them effectively communicate and perform useful tasks in a way that minimizes the end users need to interact with computers.

example: an example of pervasive computing is an Apple watch informing a user of a phone call and allowing him to complete the call through the watch.

9)Differences: swapfiles operate by swapping entire processes from system memory into the swap file. this immediately frees up memory for other applications to use. In contrast, page files function by moving pages of a program from system memory into the paging file. These pages are 4 KB in size. The entire program does not get swapped wholesale into the paging file.

we use swapping when we need memory immediately to run other important applications. paging can't frees up whole memory at a time so we use this where freeing up memory is not immediately required.

virtual memory extends the amount of internal memory and iuses some space on your hard disc that is called page file(or swap file).

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