What is the difference between a static and dynamic web application?

Vaibhav Kothia May 26, 2023 0 Comments

Static Web Application:
A static web application is a web application that is coded in a fixed format and does not change in response to user input or other external stimuli. Examples of static web applications include a portfolio website, an informational website, or a basic blog.

Dynamic Web Application:
A dynamic web application is a web application that is coded in a flexible format and changes in response to user input or other external stimuli. Examples of dynamic web applications include a social media website, an online store, or a content management system.

What are the advantages of using JavaScript?

Vaibhav Kothia May 26, 2023 0 Comments

1. Easy to learn and use: JavaScript is relatively easy to learn and use compared to other programming languages, and it is also widely used, so it is easy to find resources and tutorials for help. For example, if you wanted to make a simple website with a few interactive features, you could easily learn the basics of JavaScript and use it to make your website come to life.

2. Cross-platform compatibility: JavaScript can run on multiple platforms, including web browsers, servers, and mobile devices. This means that you can write code once and it will work on any platform. For example, you could write a JavaScript program that runs on a web browser, and then easily port it to a mobile device with minimal changes.

3. Rich interfaces: JavaScript is used to create interactive web interfaces that make websites more user-friendly and engaging. For example, you could use JavaScript to create drop-down menus, sliders, and other interactive elements that make navigating a website easier.

4. Increased speed: JavaScript can be used to reduce the amount of time it takes for a website to load. For example, you could use JavaScript to pre-load images and other content, so that when a user visits a page, the content is already loaded and ready to go. This can significantly increase the speed of a website.

How does URL mapping work in Django?

Vaibhav Kothia May 26, 2023 0 Comments

URL mapping in Django works by mapping a URL pattern to a view. A view is a Python function that takes a web request and returns a web response.

For example, if you have a URL like ‘/articles/’, you can map it to a view called ‘articles_view’. This view would be responsible for handling the request and returning the appropriate response.

In Django, you would do this by adding a URL pattern to your project’s urls.py file:

urlpatterns = [
path(‘articles/’, views.articles_view, name=’articles_view’),
]

In this example, ‘articles_view’ is the name of the view we want to map to the URL ‘/articles/’. When a request is made to this URL, Django will call the ‘articles_view’ view and return the response.

How do you handle errors in Express.js?

Vaibhav Kothia May 26, 2023 0 Comments

Errors in Express.js can be handled using the Express middleware “error-handler”. This middleware takes an error object as its first argument and a function as its second argument. The function will be called with the error object as its only argument.

For example:

app.use(function (err, req, res, next) {
console.error(err.stack);
res.status(500).send(‘Something broke!’);
});

What is a closure in JavaScript?

Vaibhav Kothia May 26, 2023 0 Comments

A closure is an inner function that has access to the variables and parameters of its outer function, even after the outer function has returned. Closures are a powerful feature of JavaScript that can be used to create private variables and create functions that have persistent memories.

Example:

function outerFunction(x) {
let y = x;
return function innerFunction(z) {
return y + z;
}
}

let myClosure = outerFunction(5);
console.log(myClosure(10)); // 15