Object Oriented Language Questions and Answers - DoAnswers.com

An object-oriented programming language (also called an OO language) is one that allows or encourages, to some degree, object-oriented programming methods. Simula (1967) is generally accepted as the first language to have the primary features of an object-oriented language. It was created for making simulation programs, in which what came to be called objects were the most important information representation. Smalltalk (1972 to 1980) is arguably the canonical example, and the one with which much of the theory of object-oriented programming was developed. OO languages can be grouped into several broad classes, determined by the extent to which they support all features and functionality of object-orientation and objects: classes, methods, polymorphism, inheritance, and reusability. An object-oriented programming language (also called an OO language) is one that allows or encourages, to some degree, object-oriented programming methods. Simula (1967) is generally accepted as the first language to have the primary features of an object-oriented language. It was created for making simulation programs, in which what came to be called objects were the most important information representation. Smalltalk (1972 to 1980) is arguably the canonical example, and the one with which much of the theory of object-oriented programming was developed. OO languages can be grouped into several broad classes, determined by the extent to which they support all features and functionality of object-orientation and objects: classes, methods, polymorphism, inheritance, and reusability.

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C Interview Questions and Answers

The 'C' programming language was originally developed for and implemented on the UNIX operating system, on a DEC PDP-11 by Dennis Ritchie. One of the best features of C is that it is not tied to any particular hardware or system. This makes it easy for a user to write programs that will run without any changes on practically all machines. C is often called a middle-level computer language as it combines the elements of high-level languages with the functionalism of assembly language. C allows the manipulation of bits, bytes and addresses- the basic elements with which the computer functions. Another good point about C is its portability which makes it possible to adapt software written for one type of computer to another. C was created, influenced, and field tested by working programmers. The end result is that C gives the programmer what the programmer wants. C offers the speed of assembly language and the extensibility of FORTH, but few of the restrictions of Pascal and Modula-2.

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C++ Interview Questions and Answers

C++ is an enhanced version of the C language. C++ includes everything that is part of C and adds support for object- oriented programming (OOP). In addition, C++ also contains many improvements and features that make it a "better C", independent of object oriented programming. C++ is actually an extendible language since we can define new types in such a way that they act just like the predefined types which are part of the standard language. If you just use C++ as a better C, you will not be using all of its power. Like any quality tool, C++ must be used the way it was designed to be used to exploit its richness. Some of the new features include encapsulation, inline function calls, overloading operators, inheritance and polymorphism. I am not going to explain what they mean here as that would simply take me away from my purpose here, but you can refer to any good C++ book or the C++ FAQ for more information.

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Eiffel Interview Questions and Answers

Eiffel is an ISO-standardized object-oriented programming language designed for extensibility, reusability, reliability and programmer productivity. With roots going back to 1985, Eiffel has development environments available from multiple suppliers. Although less well known than many other languages, Eiffel is used by large projects in various industries (finance, aerospace, health care, games and others) as well as for teaching programming in academia. The language design is closely connected with the method, based on a set of principles: Design by contract, Command-query separation, Uniform access principle, Single choice principle, Open-closed principle, Option-Operand separation and others.

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J2EE Interview Questions and Answers

The Java 2 Enterprise Edition is a collection of related specifications and corresponding documentation that describe an enterprise-level computing architecture for the Java platform. J2EE containers, also known as application servers, such as JBoss, WebLogic, WebSphere, and others typically implement the penultimate (next-to-latest) version of the specification. ...Java 2 Platform, Enterprise Edition or J2EE is a programming platform for developing and running distributed multi-tier architecture applications, based largely on modular components running on an application server. The J2EE platform is defined by a specification. J2EE is also considered informally to be a language or standard because providers must agree to certain conformance requirements in order to declare their products as J2EE compliant; albeit with no ISO or ECMA standard.

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JAVA Interview Questions and Answers

Java is a programming language expressly designed for use in the distributed environment of the Internet. It was designed to have the "look and feel" of the C++ language, but it is simpler to use than C++ and enforces an object-oriented programming model. Java can be used to create complete applications that may run on a single computer or be distributed among servers and clients in a network. It can also be used to build a small application module or applet for use as part of a Web page. Applets make it possible for a Web page user to interact with the page. The major characteristics of Java are: The programs you create are portable in a networkThe code is robust.Java is object-oriented.In addition to being executed at the client rather than the server, a Java applet has other characteristics designed to make it run fast. Relative to C++, Java is easier to learn. (However, it is not a language you'll pick up in an evening!) Java was introduced by Sun Microsystems in 1995 and instantly created a new sense of the interactive possibilities of the Web. Both of the major Web browsers include a Java virtual machine. Almost all major operating system developers (IBM, Microsoft, and others) have added Java compilers as part of their product offerings. The Java virtual machine includes an optional just-in-time compiler that dynamically compiles bytecode into executable code as an alternative to interpreting one bytecode instruction at a time. In many cases, the dynamic JIT compilation is faster than the virtual machine interpretation.

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Sather Interview Questions and Answers

Sather is an object-oriented programming language. It originated at the University of California, Berkeley, circa 1990. It supports garbage collection and generics by subtypesSather is an object-oriented programming language. It originated circa 1990 at the International Computer Science Institute at the University of California, Berkeley, developed by an international team led by Steve Omohundro. It supports garbage collection and generics by subtypes. Originally, it was based on Eiffel, but it has diverged, and now includes several functional programming features. It is probably best to view it as an object-oriented language, with many ideas borrowed from Eiffel. Even the name is inspired by Eiffel; the Sather Tower is a recognizable landmark at Berkeley. Sather also takes inspiration from other programming languages and paradigms: iterators, design by contract, abstract classes, multiple inheritance, anonymous functions, operator overloading, contravariant type system. Some of these features are normally only found in functional programming languages. Sather is implemented as a compiler to C, i.e., the compiler does not output object or machine code, but takes Sather source code and generates C source code as an intermediate language. Optimizing is by the C compiler, Sather code often performs better than the corresponding C++ code, and the generated C code can always be optimized by hand. Sather is dual licensed under the GNU GPL & LGPL.

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Small talk Interview Questions and Answers

Smalltalk is a dynamically typed object oriented programming language designed at Xerox PARC by Alan Kay, Dan Ingalls, Ted Kaehler, Adele Goldberg, and others during the 1970s. The language was generally released as Smalltalk-80 and has been widely used since. Smalltalk is in continuing active development, and has gathered a loyal community of users around it.An object-oriented operating system and programming language developed at Xerox Corporation's Palo Alto Research Center. Smalltalk was the first object-oriented programming language (Simula was the very first). Although it never achieved the commercial success of other languages such as C++ and Java, Smalltalk is considered by many to be the only true object-oriented programming environment, and the one against which all others must be compared

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