DATA TYPES & LITERALS DATA TYPES: Every variable in java should have some type. Every expression should have some type and every type is strictly defined. Every Assignment should be checked by the compiler for type compatibility Hence java language is considered as strongly typed programming language Java is a not pure object oriented programming language. Because several OOPs features not supported by java. Like multiple inheritances, operator overloading, etc. Moreover we are using primitive datatypes in java which are not objects Primitive Data types: Primitive Datatypes (8) Numeric...
Database is a collection of information organized in such a way that a computer program can quickly select desired peices of data. You can think of database as an electronic filing system. Traditional databases are organized by fields, records and files. an alternative concept in database desing is known as Hypertest . In a Hypertext database any object, whether it be a piece of text, a picture, or a film can be linked to any other object. To access information from the system you need DBMS(database management system) . This is a collection of programs that enables you to store, modify and extract information from a database. database is used as shorthand for DBMS, there are many different types of DBMSs, ranging from small systems that run on personal computers to huge systems that run on mainframes. few database applications: computerized library systesm, Automated teller machines, flight reservation systems,computerized parts inventory systems. D...
EVERYTHING ABOUT INTERNET 1.Internet: It is a global network connecting millions of computers. More than 190 countries are linked into exchanges of data, news, and opinions. According to Internet Live stats as of DEC 30 2014 there are 3,037,608,300 Internet users worldwide We generally connect internet through Internet Service Provider [ISP]. Who Owns the Internet? No single person or organization controls the Internet in its entirely. The Internet is more of a concept than an actual tangible entity, and it relies on a physical infrastructure that connects networks to other networks. Is Web and Internet the Same? The Internet is not synonymous with World Wide Web . The Internet is a massive network of networks, a networking infrastructure. It connects millions of computers together globally, forming a ...
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