What Is Inversion of Control? Inversion of Control is a principle in software engineering which transfers the control of objects or portions of a program to a container or framework. We most often use it in the context of object-oriented programming. In contrast with traditional programming, in which our custom code makes calls to a…

Servlet : Servlet is a server side web component which is responsible to generate dynamic response. Total servlet life cycle managed by web container. Servlet container It is also known as servlet engine. It is responsible to manage and execute servlet component. In Tomcat servlet container’s name is CATALINA. How…

CSS Flexbox CSS flexbox layout allows you to easily format HTML. Flexbox makes it simple to align items vertically and horizontally using rows and columns. Items will “flex” to different sizes to fill the space. It makes responsive design easier. Terminology Before you learn what the flexbox properties do, it’s important to understand…

Database normalization is the process of structuring a database, usually a relational database, in accordance with a series of so-called normal forms in order to reduce data redundancy and improve data integrity. It was first proposed by Edgar F. Codd as part of his relational model. Codd introduced the concept…

Collection Framework : Collection Framework defines several classes and interfaces which can be used to represent a group of objects as a single entity. You can perform all operations such as searching, sorting, insertion, manipulation, deletion, etc., on Java collections just like you do it on data. The primary advantages…

Object-oriented programming (OOP) is a programming paradigm based on the concept of “objects”,So, let’s first know about objects - Object — Objects are key to understanding object oriented technology. Anything in the real world that can be perceived is object. For example — human, dog, desk etc. These real world…