You often face situation where you have to submit a HTML form without using SUBMIT type button.
Abstract class and interface are very well known words for programmers. These two are very important for object oriented programming. Though interface and abstract class have few similarities, but there are some differences as well.
Base64 is an encoding method which is used to represent binary data in ASCII format. Conversion of images into base64 string is very useful for such pages where a large number of images are displayed.
301 redirect is a very useful way for web page redirection. It is also very important for search engine optimization (SEO) and today everybody knows that without proper search engine optimization, no website can get good rank in search results.