Free Educational Tutorials
Question: What is Computer? A computer is derived from the Latin word ‘Computare’ which means ‘calculate’. So according to this definition, a computer is a machine which can perform calculations at very high speed. A computer is an electromechanical device that works on command and performs mathematical and logical operations within a short time and with high accuracy. A…
Noise is any undesired signal in a communication circuit. Another definition calls noise unwanted disturbances superimposed on a useful signal, which tends to obscure its information content. There are many varieties of noise; however, the four most important to the telecommunication/data communication technologist are thermal noise, intermodulation noise, crosstalk and impulse noise. Noise refers to…
A video game is an electronic game that involves interaction with a user interface to generate visual feedback on a two- or three-dimensional video display devices such as a TV screen, virtual reality headset or computer monitor where players interact with objects displayed on a screen for the sake of entertainment. The purpose of video…
In this very article, we will be discussing the advantages and disadvantages of science and technology. As we know we are in the era of tech and this keeps changing every day. Making the sense that science and technology have changed our lives very much. So lets merits and demerits of science and technology. Science…
Concept of Normalization Normalization is the process of the splitting table to minimize data redundancy and establishing a relationship between tables. It is must be carefully designed in order to get full advantages It provides flexible, data consistency and avoids anomalies while inserting, deleting and updating data. Forms of Normalization There are six normal Forms…
What is Database Management System and Its Objectives?: A database is a repository for a collection of related data or faces. The most obvious example of the non-computerized database is a telephone directory database programs can also sort a list of data arranging them in alphabetical, numeric or chronological order and can search or query data…
Organic Farming is a method of crop and livestock production that involves much more than choosing not to ause pesticides, fertilizers, genetically modified organisms, antibiotics and growth hormones. Those people who are aware of their health they are using organic products, which minimize their risk and fear of diseases like cancer, diabetes and asthma etc….
Database network models are used to organize data it determines the manner in which data can be stored, organized and manipulated in a database system. Hierarchical Database Model A hierarchical database is the oldest model of the database. We frequently find data exhibiting a hierarchical (Level or tree structure) relationship. Database system must start from the top…
A database administrator is an individual responsible for maintaining the DBMS It has many different responsibilities, but the overall goal of DBA is keeping the server up all the times. It can be someone who has concentrated in the areas of database design and administration. A DBA can be a programmer who took the responsibility…
It is an assessment of the practicality of a proposed plan or method. Which helps to find the strengths and weaknesses of an existing business or proposed venture, opportunities and threats present in the environment, the resources required to carry through, and ultimately the prospects for success. A feasibility study is used for…, To determine whether…