Thursday, 29 January 2015

Pascal Programming Part7 Interview Questions and Answers

31. Is IP Pascal new?
 Ans: IP was never coined to be a particular acronym. Present definitions are Internet Pascal, Intellectual Property Pascal, InterPlatform Pascal. The name IP Pascal was chosen to represent the flavor of today's machine and process independent design processes. As some of you may know, I am heavily involved in the networking industry. Internet Protocol was originally envisioned as a way to "bridge" different networks together. The principle was that one carefully constructed standard would be able to bridge any number of different networks together, and the overhead of a second level protocol would only be incurred once. This is much like saying that designing one standard plug, then designing a series of adapters to that plug from other plug types, can unify incompatible systems.
IP Pascal is definitely designed to do just that

32. Is Pascal designed to be a teaching language?
 Ans: This assertion has often been used to imply that Pascal is a toy language. I can't state the answer any better than Niklaus Wirth himself did:
"Occasionally, it has been claimed that Pascal was designed as a language for teaching. Although this is correct, its use in teaching was not the only goal. In fact, I do not believe in using tools and formalisms in teaching that are inadequate for any practical task." - Niklaus Wirth, from the 1984 ACM A.M. Turing award lecture.

33. What are the different Pascal standards?
 Ans: he original Pascal standard was an unofficial standard documented by the author, Niklaus Wirth, in "The Report". The first official standard was ISO 7185 issued in 1983. This was followed by the extended standard, ISO 10206, in 1990. Another standard was the Object-Oriented Extension to Pascal. However, this standard was never finished, and was basically abandoned for lack of interest.

34. What is standard Pascal?
 Ans: Pascal is one of a series of languages put forth by one of the most prolific computer language creators, Niklaus Wirth, a professor at Institut fur informatik, ETH, Zurich, Switzerland. Professor Wirth participated in various versions of Algol, a language put forth by international cooperation that introduced the basic concepts of structured programming to the world. Wirth terms Pascal as a descendant of Algol 60 (for Algol, 1960 standard). The "official" descendant of Algol 60 was Algol 68, famous for having assignment as an expression operator (a basic feature of the later language C). Wirth felt that the design committee for Algol, after Algol 60, was losing focus and creating an unnecessarily complex language.
While Algol W has had it's fans, the language Pascal was considered to be a new high of consistent language design. The first draft of Pascal was created in 1968. The first compiler was operational in 1970, and the language was generally published in 1971. In 1973, after two years of testing and use, the language was revised into it's final form. That was detailed by "The Pascal User Manual and Report".

35. Why is not IP Pascal compatible with Turbo/Borland?/Dephi?/Kylix Pascal ?
 Ans: A. IP Pascal was designed to follow the original Pascal standard since 1980, following Niklaus Wirth's "The Pascal User Manual and report" [Jensen and Wirth] from 1974. In 1983, the ISO 7185 standard was released, and the minor changes to J&W Pascal were implemented in IP Pascal.
Unfortunately, none of the Borland products followed either the "User Manual and Report" nor the ISO 7185 Pascal standard, even though it preceeded Borland? implementations by a decade. Borland? products have a large user base, and we respect that, and hope to provide tools to convert user's Borland? compatible products to IP Pascal for interoperation.
For IP Pascal to have been compatible with Borland? products, considerable changes away from standard Pascal would have been required. Also, since there is no official published Borland? language standard, there would be no way to guarantee perfect compatibility with Borland? products. Finally, IP Pascal is directed at a long term standard implementation. Borland? products have traditionally been machine and operating system dependent. The different Borland? products, Turbo Pascal, Borland? Pascal, Borland? Windows Pascal, Delphi? and Kylix, are not completely compatible with each other, and would have been a moving target during the many years IP Pascal has been in operation.
More Questions & Answers :-
Part1  Part2  Part3  Part4  Part5  Part6  Part7  Part8  Part9

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