How an Application Works

Hello, everyone, welcome back.

We will try to understand what is a software or I would say an application

these companies build together.

So let's get started.

Application is a piece of software designed to do a specific or narrow function, for example: a food delivery app might only be designed for users to get food from local restaurants delivered and it can't be used for anything else, like grocery shopping or making restaurant reservations.There are millions of apps available in various categories like business, productivity, shopping and scheduling.In order to understand more in detail, let us look at the technical part.For example, take any app that you use.You will connect to it through desktop or mobile.You will get into the application network and you will hit their Web servers.The web server will in turn establish connection with the application servers to fetch information you are browsing for. The application servers connect with automation engine, which in turn will connect with fulfillment engine to process your request quickly. No matter for whatever purpose you are opening any website.These basic steps mostly happen with all of them.We were talking earlier about food delivery app.When you open the app, you will hit their Web servers, which will fetch details from application servers.Let's say you want to order pizza. You open the app, here you connect to the web server of the application.The Web server will connect with the application server to show you different types of pizza stores near to your house. You click on one of the shop.Your request of selecting the shop is sent to the application server through web server.So now the question is, how does the application server understands which shop I have selected?Well, this happens due to presence of automation engine and fulfillment engine, which has all the coding to identify different types of request. The application server will fetch the details from its inventory, which will be already stored in its database.The application server will send you the information back to your screen through the Web server.Now, let's say that you select one of the pizzle from inventory and add it to your card.Now again, a request travels from a Web server to application server.Application server understands the request due to automation engine and fulfillment engine and the application stores.your request in its inventory and now your pizza is added to the cart.You will decide that along with pizza, you also want something to drink.You click on drink section. Again request travels following the same flow of web server to application server, understand your request,fetch details from inventory and show you information back to screen through application layer and back to web servers.You select the pizza you want, you select the drink which you want, and that also gets added to the cart again through the same flow.Now, let's say you are done with selection of all items and you click to checkout. The application takes you to the billing page.

Here you establish a connection with one more layer, which is the billing system.

Application servers here also understand your request due to the automation engine and fulfillment engine and shows you details on screen along with the same flow. Here you can see in order to fulfill one request of selection, so many connections are taking place between servers set of and different components of an application and all happen within fraction of a second.

This means the application processing, speed connection between different components of the application

and server response time.

All are very critical and equally important.

In this example, we looked at an application as a whole.

You would have noticed here in one layer, which is accepting your application.

The second layer is transferring that information to processing and the third system processes your

request and sent you the information back on screen.