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“Unlock the full potential of Quora with the “People Also Ask” feature. In this article, you’ll learn how to use it to discover new and relevant information, and how it can help you expand your knowledge on a variety of topics.”
People Also Ask these questions from Quora
Question.No.1:What strategies are available to optimize code within front-end web projects while maintaining performance speed?
Answer:-There are several strategies that can be used to optimize code within front-end web projects while maintaining performance speed. Some of these include:
- Minimizing the number of HTTP requests made by the browser by combining and minifying CSS and JavaScript files.
- Using a Content Delivery Network (CDN) to serve static assets, such as images, videos, and fonts, from a location that is geographically closer to the user.
- Using browser caching to store commonly used assets in the browser’s cache, so that they don’t need to be re-downloaded each time a user visits the website.
- Optimizing images by compressing them and using the appropriate file format (e.g., using JPEG for photographs and PNG for graphics with transparent backgrounds).
- Using code splitting and lazy loading to only load the code and assets needed for the current page, rather than loading all assets at once.
- Using a performance monitoring and analysis tool to identify and fix bottlenecks in the code.
- Reducing the number of DOM elements and reducing the number of CSS styles and JavaScript events
- Use of code splitting and dynamic imports to only load the javascripts and css that are needed for that particular route.
- Use of pre-processors for css and javascript like SASS, LESS, Typescript etc.
- Use of browser-specific prefixes and polyfills to ensure cross-browser compatibility
Question.No.2:How much does it cost to run a simple web application on Google App Engine? How many instances are needed for peak traffic volumes (up to hundreds of thousands page views per day)?
Answer:-The cost of running a simple web application on Google App Engine can vary depending on several factors, such as the number of requests, the amount of data stored and transferred, and the number of instances running.
- Google App Engine’s pricing model is based on the resources used by the application, such as CPU, memory, and storage, so the cost can be estimated by calculating the usage of those resources.
- For a simple web application with low traffic, the cost can be as low as a few dollars per month. However, as traffic and usage increases, the cost will also increase.
- In terms of instances, it depends on the traffic volume and the resources requirements of your app. Google App Engine’s automatic scaling feature can automatically increase or decrease the number of instances based on traffic, so you can handle peak traffic volumes.
- For example, if you expect to handle hundreds of thousands of page views per day and your app can handle around 50 requests per second per instance, you might need around 4000 instances.
It is important to keep in mind that the cost of running a web application on Google App Engine can vary based on the specific requirements of your application, so it’s best to use the Google App Engine Pricing Calculator to get a more accurate estimate of the cost.
Question.No.3:What is a dynamic URL? How do you create one with Express JS?
Answer:-A dynamic URL is a URL that contains variables or placeholders that change based on the context or user input. These variables or placeholders are replaced with actual values when the URL is requested.
For example, a URL that contains a placeholder for a user’s ID, like “www.example.com/users/:userId”, would be considered a dynamic URL. When a user requests this URL with a specific user ID, such as “www.example.com/users/123”, the placeholder “:userId” would be replaced with the actual value “123”.
In Express.js, you can create a dynamic URL by using the app.get() or app.post() method and specifying a route with placeholders for the dynamic parts of the URL.
Here is an example of how you can create a dynamic URL for a user's profile page in Express.js:
app.get('/users/:userId', function (req, res) {
// code to handle the request and render the user's profile page
});In this example, the route ‘/users/:userId’ has a placeholder for the userId variable. When a user requests this URL with a specific user ID, such as “www.example.com/users/123”, the req.params.userId will be equal to “123”.
You can also use the app.param() method to specify a middleware function that will be called before any route handlers that match the specified parameter. This function can be used to pre-process the parameter value, validate it, or load data from a database.
app.param('userId', function (req, res, next, id) {
// code to load the user's data from a database based on the id
req.user = user;
next();
});In this example, the middleware function will be called with the value of the userId parameter before any route handlers that match the parameter. The function can load the user’s data from the database and attach it to the request object.
Question.No.4:What are some advantages and disadvantages of using ReactJS with Redux over just plain old JavaScript?
Answer:-ReactJS is a JavaScript library for building user interfaces and is often used in combination with a library called Redux, which is used for state management. Here are some advantages and disadvantages of using ReactJS with Redux over plain JavaScript:
Advantages:
Component-based architecture: React allows developers to break down the UI into smaller, reusable components, which makes it easier to manage and understand the codebase.
Virtual DOM: React uses a virtual DOM, which improves the performance of the application by reducing the amount of DOM manipulation that needs to be done.
One-way data flow: Redux follows a one-way data flow, which makes it easier to understand and predict how the application will behave.
Developer tools: There are many developer tools available for React and Redux, such as the React Developer Tools and the Redux DevTools, which can help developers debug and optimize the application.
Large Community: React has a large and active community, which means that developers can find answers to their questions, as well as a lot of resources and tutorials.
Disadvantages:
Steep learning curve: React and Redux can have a steep learning curve, especially for developers who are new to the framework.
Boilerplate code: Redux can generate a lot of boilerplate code, which can make it more difficult to understand and maintain the codebase.
Complexity: React and Redux can be used to build simple applications, but as the complexity of the application increases, it can become more difficult to manage and understand the codebase.
Over-architecture: Developers may over-architect the application which might lead to unnecessary complexity, and it would be harder to maintain.
Higher bundle size: React and Redux can add a significant amount of code to the bundle, which can increase the load time of the application.
Overall, ReactJS with Redux is a powerful tool that can make it easier for developers to build complex and scalable web applications, but it does require a significant investment in learning and development time.
Question.No.5:How important is mobile optimization when creating web applications or sites?
Answer:-Mobile optimization is extremely important when creating web applications or sites. With the increasing number of internet users accessing the web on their mobile devices, it’s crucial that web applications and sites are optimized for mobile in order to provide a good user experience for those users.
Here are a few reasons why mobile optimization is important:
- Increased mobile usage: As of 2023, more than half of all internet traffic comes from mobile devices, and this number is expected to continue to grow. Therefore, it’s important that web applications and sites are optimized for mobile in order to reach the largest possible audience.
- Improved user experience: Mobile optimization can improve the user experience by making it easier for users to navigate and interact with the web application or site on their mobile device. This can lead to increased engagement and conversions.
- Better search engine rankings: Search engines, like Google, favor mobile-optimized websites in their mobile search results. Websites that are not optimized for mobile may be penalized in mobile search results, which can lead to decreased visibility and traffic.
Better accessibility: Mobile optimization can help make web applications and sites more accessible to users with disabilities, who may rely on assistive technologies like screen readers.
Better conversion rates: A well-optimized mobile site can result in better conversion rates, as users are more likely to make a purchase or take an action when the experience is tailored to their device.
Overall, mobile optimization is essential for providing a good user experience, increasing reach, and improving search engine rankings.