<transcript><audio_54>some more slides I am going to go really fast here on web services the only thing I want to mention is this is again something which was introduced a long time back then quality years ago it</transcript><caption><image_55>The image is a slide from a presentation about web services. It has a title "Web Services" at the top and a subtitle "Allow data on Web to be accessed using remote procedure call mechanism". Below the title, there are three bullet points that explain the different types of web services available.

The first bullet point states that two approaches are widely used:

- Representation State Transfer (REST) allows use of standard HTTP request to a URL to execute a request and return data
- Object Notation (JSON) for sending request data, as well as for returning results
- See Section 23.7.3

There are also two bullet points on the slide, one for Big Web Services and one for Standard protocol layer built on top of HTTP.</caption><transcript><audio_56>didn't take off that much except in some limited domains non database domains it is actually used a lot but more recently even in database backed applications web services have become increasingly important there's something called rest</transcript><transcript><audio_57>which is a way of accessing web server light so any any other web application from a program as opposed to from a browser which is being used increasingly to build applications so your advanced</transcript><transcript><audio_58>students may want to figure out more about reston about something called JavaScript object notation if you know XML this is a simplified XML ish thing which is very tightly integrated with</transcript><transcript><audio_59>JavaScript and it is used extensively off late in building applications where data has to be transferred to the browser from the back end it is also used to store data in a database and retrieve it to the</transcript><transcript><audio_60>there are few slides on rapid application development i'm going to skip these go read them offline there are also a few slides on web server performance something about parallelism which I already told you about some</transcript><caption><image_61>The image is a slide from a presentation on improving web server performance. It has a blue background and white text. The slide is divided into three sections.

The first section is titled "Improving Web Server Performance" and it explains that performance is an issue for popular web sites. It states that performance may be accessed by millions of users every day, thousands of requests per second at peak time. It also mentions that parallel processing using tens to thousands of servers is common and that caching techniques used to reduce cost of serving pages by exploiting commonities between requests. The second section is labeled "Caching of JDBG connections between server requests" and shows that caching results of database queries can be updated if underlying database changes. The third section is "And at the client browser" and mentions that and many other techniques can be used to improve the performance of a web server.</caption> some more slides I am going to go really fast here on web services the only thing I want to mention is this is again something which was introduced a long time back then quality years ago it didn't take off that much except in some limited domains non database domains it is actually used a lot but more recently even in database backed applications web services have become increasingly important there's something called rest which is a way of accessing web server light so any any other web application from a program as opposed to from a browser which is being used increasingly to build applications so your advanced students may want to figure out more about reston about something called JavaScript object notation if you know XML this is a simplified XML ish thing which is very tightly integrated with JavaScript and it is used extensively off late in building applications where data has to be transferred to the browser from the back end it is also used to store data in a database and retrieve it to the there are few slides on rapid application development i'm going to skip these go read them offline there are also a few slides on web server performance something about parallelism which I already told you about some
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