Features questions

Implementing PWA features in a React application involves adding a service worker for offline capabilities, creating a web app manifest for installation, and ensuring responsive design. Tools like Create React App provide built-in support for PWA features with minimal configuration.

Hooks are a feature in React 16.8+ that allow you to use state and lifecycle features in functional components. For example, `useState` lets you add state to a functional component, and `useEffect` allows you to perform side effects like fetching data. They simplify code and make it easier to reuse stateful logic.

PDO (PHP Data Objects) is a database access layer providing a uniform interface for accessing various databases. Unlike `mysqli`, PDO supports multiple database drivers (e.g., MySQL, PostgreSQL, SQLite). It allows for prepared statements, which help protect against SQL injection. For example: `$pdo = new PDO('mysql:host=localhost;dbname=testdb', 'username', 'password');`. PDO is preferred for its flexibility and abstraction layer.

HTML5 is the fifth version of the HTML standard. It introduces new elements, attributes, and behaviors, enhancing the language's capability to create more dynamic and interactive web content. For example, `<article>` and `<section>` elements are used for better semantic structuring.

Flutter is an open-source UI software development toolkit created by Google. It allows developers to build natively compiled applications for mobile, web, and desktop from a single codebase. Key features include a rich set of pre-designed widgets, hot reload, and high performance. For instance, using Flutter, you can create a beautiful mobile app with minimal code.

Java is known for its portability, object-oriented nature, strong memory management, and robust security features. It uses bytecode for portability, has automatic garbage collection, and provides a secure environment through its built-in security features. These characteristics make Java suitable for various applications. 
 
List features like portability and security.