<video><caption><image_2>The image shows a man standing in front of a banner that reads "INDIA" with the logo of the Indian Institute of Science and Technology. He is wearing a yellow shirt and has a microphone in his hand. He appears to be giving a presentation or giving a speech. The man has a mustache and glasses and is looking directly at the camera. The background is a plain white wall.</caption><caption><image_3>The image shows a man standing in front of a whiteboard with a banner on the right side. He is wearing a yellow shirt and has a microphone attached to his shirt. He appears to be giving a presentation or giving a speech. The man is Prof. S. Sudarshan, the Department of CSE, IIT Bombay. He has a serious expression on his face and is looking directly at the camera. The banner on his left side of the image has the logo of the department and the words "Department of S.S.Sudarshan" written on it.</caption></video><transcript><audio_4>what I am going to do now is introduce you to a few topics in the next five minutes or so without going into any details whatsoever and let you read it offline so do not try to read the slides please read only the headings of the slides I know time is limited but I</transcript><caption><image_5>The image is a slide from a presentation about application architectures. It has a blue background and white text. The slide is divided into three sections.

The first section is titled "Application Architectures" and has a title that reads "Application layers". Below the title, there is a description of the application layers. The description explains that the application layer is a presentation or user interface, which is a model-view-controller (MVC) architecture that allows the user to view, display, and display data on display devices. The presentation layer provides a view of the user's events, executes actions, and returns a view to the user. The business-logic layer provides high-level view of data and actions on data, which helps the user navigate through the data storage schema. The data access layer provides both business logic layer and the underlying database, which provides mapping from object model of business layer to relational model of database.</caption><transcript><audio_6>wanted to introduce you to these terms so that you will go back and read them the first one is an application architecture there is something called a model view controller architecture which is a buzzword many people throw around</transcript><transcript><audio_7>and this slide tells you what those things are and it is a way of building web applications which separates out the code into layers one layer which has all the real logic is often called the</transcript><transcript><audio_8>business logic layer and that layer does not worry at all about how forms appear and displayed how you collect input how you validate input all that is irrelevant for the business logic layer the business logic layer does simple</transcript><transcript><audio_9>things like register a student look up a student registration in return the data it does not format it the presentation or user interface layer takes the data which it gets from the business logic layer and formats it and displays it and</transcript> what I am going to do now is introduce you to a few topics in the next five minutes or so without going into any details whatsoever and let you read it offline so do not try to read the slides please read only the headings of the slides I know time is limited but I wanted to introduce you to these terms so that you will go back and read them the first one is an application architecture there is something called a model view controller architecture which is a buzzword many people throw around and this slide tells you what those things are and it is a way of building web applications which separates out the code into layers one layer which has all the real logic is often called the business logic layer and that layer does not worry at all about how forms appear and displayed how you collect input how you validate input all that is irrelevant for the business logic layer the business logic layer does simple things like register a student look up a student registration in return the data it does not format it the presentation or user interface layer takes the data which it gets from the business logic layer and formats it and displays it and
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