Monthly Archives: August 2019

by E-Computer Concepts 11 months ago

Role of Database Management System

A database management system performs the following functions : 1. Organises Data Data are organised or structured according to the specification of the data definition language. These specifications are introduced by the database...

by E-Computer Concepts 11 months ago

Types of Databases

The growth of distributed processing, end user computing, and decision support and executive information systems has caused the development of several major types of database. There are six major types of databases that may be found in...

by E-Computer Concepts 11 months ago

What is Algorithm?

Planning a program involves defining its logic (the correct sequence of instructions needed to solve the corresponding problem). The term algorithm refers to the logic of a program. It is a step-by-step description of how to arrive at...

by E-Computer Concepts 11 months ago

Segmentation in Memory Management

Segmentation is a memory management scheme in which the physical memory allocated to the process is non-contiguous. In Segmentation logical address space is divided into number of small blocks known as segmentation. Segments are...

by E-Computer Concepts 11 months ago

Paging in Memory Management

Paging is the memory management scheme in which the physical memory allocated to a process is non contiguous. In paging, physical memory is divided into fixed size blocks called frames and the logical memory is divided into fixed size...

by E-Computer Concepts 11 months ago

What is Firmware?

Firmware refers to a sequence of instruction (software) substituted for hardware. For example, when cost is more important than performance, a computer system architect might decide not to use special electronic circuits (hardware) to...

by E-Computer Concepts 11 months ago

Output Devices

An output is an electromechanical device that accepts data from a computer and translates them into a form suitable for use by outside world (users). Several output devices are available today. MonitorsPrintersPlottersScreen Image ProjectorVoice...

by E-Computer Concepts 11 months ago

Secondary Storage Devices

Primary storage of today’s computer system has following limitations: Limited Capacity : It is often necessary to store many millions, sometimes billions, and even trillions, of bytes of data in a computer. Unfortunately, storage...

by E-Computer Concepts 11 months ago

Three Level Architecture Of DBMS

The three level architecture of DBMS as given by American National Standards Institute (ANSI) Standard Planning and Requirements Committee (SPARC) consists of following three levels External Level or User ViewConceptual Level or Global...

by E-Computer Concepts 11 months ago

Database Management System (DBMS)

DBMS is a collection of interrelated data and a set of programs to access those data. DBMS is a software system that allows users to define, create and maintain a database and provide controlled access to the data. A DBMS is a collection...