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   100 Continue. Request initiated and not rejected. The client can continue. 101 Switching Protocols. The server reports having received a request to change protocol and it is accepted. 102 In processing. Makes clear that the server is active and not inaccessible.(WebDav Extension). Request processed 200 Request completed successfully.The page is found and displayed. 201 Created.Establishing a link between the client and the server in the form of URI on a newly created resource. 202 Accepted.The request is received and accepted but not yet processed.. 203 Non-Authoritative information.The server response provides information that does not certify it. It could come from a third-party source. 204 No content.No information to return from the server. 205 Reset content. Request processed, the client must reset the

History of C++               In 1960s different languages were used for different applications, for example, FORTRAN for Engineering Application, COBOL for Commercial Application and so on. Later on an international committee was set up that developed a single language called ALGOL 60 , Which can be used for all application. But this language was too abstract and too general to be accepted. This lead to the development of a new language named CPL ( Combined Programming Language ), which had so many features and was hard to learn and implement. After this Martin Richards BCPL (Basic Combined Programming Language) and Ken Thompson’s B language were also not accepted because they were too specific to be implemented. Finally, in 1972, Ritchie made a successful attempt at AT&T’s Bell Laboratories of USA to develop a new language called C language by inheriting the features of both the BCPL and B languages . In order to define the C language, a committee was set up to create an ANS

OPERATING SYSTEM An operating system is defined as an interface (or bridge) between the user of computer and the computer hardware. An operating creates such a friendly environment for the user in which the computer is used effectively and efficiently. An operating system performs a number inter-process communication, protection and security. Types of OPERATING SYSTEM BATCH PROCESSING OPERATING SYSTEM        Batch processing means executing a series of jobs all at one time. The jobs with similar requirements are batched together and run through the computer as a group. The term originated in the days when users entered programs on punch cards. They would give a batch of these programmed cards to the system operator, who would feed them into the computer. Batch jobs can be stored up during working hours and then executed during the evening or whenever the computer is idle. Batch processing is particularly useful for operations that require the computer or a peripheral device for an ext

What is a canonical page? A canonical page is the preferred version of a set of pages with highly similar content. Why specify a canonical page? It's common for a site to have several pages listing the same set of products. For example, one page might display products sorted in alphabetical order, while other pages display the same products listed by price or by rating. For example: http://www.example.com/product.php?item=swedish-fish&trackingid=1234567&sort=alpha&sessionid=5678asfasdfasfd http://www.example.com/product.php?item=swedish-fish&trackingid=1234567&sort=price&sessionid=5678asfasdfasfd If Google knows that these pages have the same content, we may index only one version for our search results. Our algorithms select the page we think best answers the user's query. Now, however, users can specify a canonical page to search engines by adding a  element with the attribute  rel="canonical"  to the   section of the non-canonical version of

OBJECT ORIENTED PROGRAMMING (OOP) It will certainly be moral to say that object oriented programming acts as the seventh heaven for the programmers. Till 1970s, object orientation was just thinking among programmers. But using the object oriented approach in C++ is just incredible. The prospect to accustom programming to objects allows the programmer to design various applications and to reuse the code in a more logical and creative manner. Object- oriented approach reveals a particular way of viewing about problems and tasks in terms of recognizing and describing the behavior of the applicable objects. Smalltalk is a classical example of a pure object-oriented language. C++ incorporates the facilities for both the object-oriented programming and conventional procedural programming. C++ adjoins many enhancements of its own to fresh up the problems that were present in the original C language.                    Structured programming can be roughly divided into two categories:        

VIRUSES Virus stands for vital information under siege. A virus is a destructive program that is designed to destroy the information stored in computer. It enters the system without the knowledge of the user. It enters through infected floppy or infected program or through network. It makes multiple copies of itself and causes the abnormal functioning in the system. When a virus travels through a network then it spreads to all the computers connected to the network. Virus forms its copies and place them in to the main memory. When a program is being executed by the user the virus attaches its copy to that program.               A virus cannot cause any damage to the physical devices connected to the infected computer:- 1 It decreases the speed of the computer. 2 It erases the information stored in primary and secondary memory of the system. 3 It displays unusual messages on the screen. 4 Some powerful virus can delete the instruction in the BIOS of the Motherboard. Types of Viruses 1