Laravel Interview Questions And Answers
Laravel
Laravel is a popular open-source PHP web framework that provides a structured and efficient way to develop web applications. During interviews, employers may ask questions related to Laravel to assess a candidate's knowledge and experience with the framework. Some common questions include its features, advantages, unit testing, database migrations, middleware, authentication, error handling, and deployment. Understanding these concepts and having hands-on experience with Laravel can help a candidate confidently answer these questions and showcase their expertise in the framework.
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1 - What is Laravel?
Laravel is an open source PHP web application framework designed for the development of web applications following the MVC (Model View Controller) architectural pattern. It provides a robust and elegant toolkit for creating web applications and follows a simple, yet expressive syntax.
2) What are the key features of Laravel?
Some of the key features of Laravel are:
Built in blade templating engine for creating dynamic and reusable templates.
Eloquent ORM for working with databases and creating database queries using PHP syntax.
Artisan command line interface for automating tasks and creating boilerplate code.
Powerful routing system for mapping URLs to controllers and methods.
Built in authentication system for handling user authentication and permissions.
Integration with popular third party libraries and packages.
3) What is a service container in Laravel?
The service container in Laravel is a powerful dependency injection container that manages and resolves class dependencies. It allows for easy and efficient application development by providing a unified API for accessing classes and their dependencies.
4) What is the difference between Facades and Dependency Injection in Laravel?
Facades provide a static interface to access classes from the service container, while dependency injection allows for the automatic injection of class dependencies into a controller or service. Facades offer a more convenient way of accessing classes, while dependency injection promotes better code organization and testability.
5) How do you create a migration in Laravel?
To create a migration in Laravel, you can use the artisan command `php artisan make:migration` followed by the name of the migration. This will generate a new migration file in the `database/migrations` directory, where you can define the database schema changes.
6) What is a middleware in Laravel?
Middleware is a feature in Laravel that allows you to filter HTTP requests entering your application. It sits between the request and the response and can perform tasks such as authentication, authorization, and data parsing. Middleware can be applied globally or to specific routes in a Laravel application.
7) How do you define routes in Laravel?
Routes in Laravel are defined in the `routes/web.php` file or `routes/api.php` file. You can use the `Route::get()` and `Route::post()` methods, along with the URL and controller action to define routes in Laravel.
8) How do you handle errors and exceptions in Laravel?
Laravel has a built in exception handling mechanism that allows you to define custom error pages and handle errors and exceptions gracefully. You can create custom exception handlers in the `app/Exceptions` directory and specify how Laravel should respond to specific types of exceptions.
9) What is PHPUnit, and why is it used in Laravel?
PHPUnit is a unit testing framework for PHP used for writing and running automated tests. It is integrated with Laravel to allow for testing of application functionalities and ensure that new code does not break existing functionality.
10) What are migrations in Laravel?
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Migrations in Laravel are a convenient way to manage database schema changes in a Laravel application. They allow for easy and efficient database management across different development environments and facilitate team collaboration.
11) What is the purpose of the Composer in Laravel?
Composer is a dependency manager for PHP used in Laravel to manage and install the required packages and libraries. It allows for easy management of project dependencies and ensures that the entire team is working on the same versions of packages.
12) What is the difference between soft delete and hard delete in Laravel?
Soft delete is a feature in Laravel that allows you to “softly” delete database records by marking them as deleted instead of permanently removing them from the database. This makes it possible to restore deleted records if needed. On the other hand, hard delete permanently removes the record from the database.
13) What is eager loading in Laravel?
Eager loading is an optimization technique in Laravel used to reduce the number of database queries by eager loading related models during database queries. It helps to improve application performance by reducing the number of trips to the database.
14) What are the benefits of using Laravel?
Some of the benefits of using Laravel are:
Robust and elegant toolkit for creating web applications.
Easy to learn and use, even for beginners.
Inbuilt features for authentication, authorization, routing, and caching.
Active and supportive community.
Integrations with popular third party libraries and packages like Vue.js, Bootstrap, etc.
Built in testing tools and support for unit testing.
15) What is Laravel Horizon?
Laravel Horizon is a dashboard and queue manager for Laravel applications. It provides real time monitoring and configuration options for Laravel's queue system, making it easier to manage and monitor queued jobs in a Laravel application.
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