Operating System

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...

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...

Software Components

Software Components : - Components is a modular building block for computer software. the components reside within the software architecture and communicate and collaborate with other components and entities that exist outside the boundaries...

What are stored-procedures?

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...

What is database Trigger?

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,...

What is normalization?

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.

Advantages of DBMS?

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

Short cut for Ascii characters

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      ...

computer

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...

Routers

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....

The Cables Used In Data Transmission

A transmission medium is required to carry information from a source to a destination. The information is usually a signal that has to travel a long distance. For this, the transmission media can be wired or wireless. In wired transmission, the...

An Overview of Cryptography

Cryptography is the science of transforming messages to make them secure and immune to attack. The literal meaning of cryptography is “secret writing”. If the original message is sent through a network, then any hacker can get access and change its...

The OSI model is a layered framework for the design of network that allows communication between different systems without changing the underlying hardware and software. It was introduced in 1970 by International Standards Organization (ISO) as a...

Memory types in Computer System

Memory is the main component of a computer system. It stores instructions and data in binary form that is used by the central processing unit. Memories are divided into 2 types such as. 1)    Primary memory2)    Secondary memory1) Primary memory:...

An overview of computer Networks

A computer network is a set of devices/nodes connected by communication links. And the node can be a computer, printer or any other device that can send or receive data generated by other nodes. Computer network is required for data communication...

Introduction to C Language

A programming language is designed to help in processing of certain data and to provide useful information to the user. There are lots of programming languages today that satisfy different needs of the user. For example: C, C++, Java, SQL, HTML,...

Architecture of 8085 Microprocessor

A microprocessor is an electronic device that reads instructions from memory, accepts binary data and provides output after processing data according to the instructions. You can say its function is just like human brain. Basically microprocessor...

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