Articles [Computer Science]

Phases of SDLC    A software development life cycle model is a descriptive and diagrammatic representation of the software life cycle. A life cycle model maps the different activities performed on a software product from its inception to...

Operating System is a set of control programs which coordinates between user & hardware and forms an interface between them. Operating system is a system software which communicate with the hardware of computer . It accept command in simple...

A virus is a an actively infectious computer program that places copies of itself into other application and programs, but not into data files. The reason why it gets attached itself to an executable program only, is that , in order to perform its...

Have you ever tried to insert special symbol in your document.You may have found it difficult.BuT you can do it easily by jus tfollowing shortcut keys.These symbols are also called as ascii letters.Alt+0161                     ¿Alt+0148      ...

Redundancy is controlled. Unauthorised access is restricted. Providing multiple user interfaces. Enforcing integrity constraints. Providing backup and recovery.

It is a process of analysing the given relation schemas based on their Functional Dependencies (FDs) and primary key to achieve the properties Ø Minimizing redundancy Ø Minimizing insertion, deletion and update anomalies.

A database trigger is a PL/SQL block that can defined to automatically execute for insert, update, and delete statements against a table. The trigger can e defined to execute once for the entire statement or once for every row that is inserted,...

Stored procedures are database objects that perform a user defined operation. A stored procedure can have a set of compound SQL statements. A stored procedure executes the SQL commands and returns the result to the client. Stored procedures are...

Routers are used to connect networks together and route the packets of data from one network to another. routers breks up a broadcast domain, which is the set of all devices on a network segment that hear all broadcast sent on that segment....

A computer is an electronic mechanical device designed to accept input and store data, process them and produce some output result under the direction of stored instructions. Why we call it computer unless calculator? There is a basic difference...