Laravel Interview Questions

Checkout Vskills Interview questions with answers in Laravel to prepare for your next job role. The questions are submitted by professionals to help you to prepare for the Interview.

Q.1 What do you understand by facades in Laravel

In a Laravel application, a facade is a class that provides access to an object from the container. The machinery that makes this work is in the Facade class. Laravel's facades, and any custom facades you create, will extend the base Illuminate\Support\Facades\Facade class.

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Q.2 Why do we need facades in Laravel?

Laravel ships with many facades which provide access to almost all of Laravel's features. Laravel facades serve as "static proxies" to underlying classes in the service container, providing the benefit of a terse, expressive syntax while maintaining more testability and flexibility than traditional static methods.

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Q.3 What are Events in Laravel

Laravel's events provide a simple observer pattern implementation, allowing you to subscribe and listen for various events that occur within your application. Event classes are typically stored in the app/Events directory, while their listeners are stored in app/Listeners .

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Q.4 Explain logging in Laravel

The Laravel logging facilities provide a simple layer on top of the powerful Monolog library. By default, Laravel is configured to create daily log files for your application which are stored in the storage/logs directory. The logger provides the seven logging levels defined in RFC 5424: debug, info, notice, warning, error, critical, and alert.

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Q.5 What is Localization in Laravel

Localization is the second phase of the Laravel internationalization (i18n) process. In Laravel i18n, an application is designed to fit various languages and cultures. Localization is adapting said internationalized applications to a specific language through translation.

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Q.6 What do you understand by Requests in Laravel

Laravel's Illuminate\Http\Request class provides an object-oriented way to interact with the current HTTP request being handled by your application as well as retrieve the input, cookies, and files that were submitted with the request.

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Q.7 Where route is defined in Laravel?

All Laravel routes are defined in your route files, which are located in the routes directory. These files are automatically loaded by your application's App\Providers\RouteServiceProvider . The routes/web.php file defines routes that are for your web interface.

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Q.8 Why we use events in Laravel?

As the laravel document said: Events serve as a great way to decouple various aspects of your application, since a single event can have multiple listeners that do not depend on each other. For example, you may wish to send a Slack notification to your user each time an order has shipped.

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Q.9 How to do request validation in Laravel?

Laravel has Form Request, A separate request class containing validation logic. To create one you can use Artisan command. Laravel Form Request class comes with two default methods auth() and rules() . You can perform any authorization logic in auth() method whether the current user is allowed to request or not.

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Q.10 What is a Service Container in Laravel

The Laravel service container is a powerful tool for managing class dependencies and performing dependency injection. Dependency injection is a fancy phrase that essentially means this: class dependencies are "injected" into the class via the constructor or, in some cases, "setter" methods.

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Q.11 What is Auth in Laravel?

Authentication is the process of identifying the user credentials. In web applications, authentication is managed by sessions which take the input parameters such as email or username and password, for user identification. If these parameters match, the user is said to be authenticated.

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Q.12 What is a Service Provider in Laravel

Service providers are the central place of all Laravel application bootstrapping. In general, we mean registering things, including registering service container bindings, event listeners, middleware, and even routes. Service providers are the central place to configure your application. If you open the config/app.

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Q.13 What is the register and boot method in the Service Provider class in Laravel?

Providers have two “lifetime” methods: register() and boot() . The register() method is where you should add bindings to the service container. The boot() method is for performing actions after all service providers have registered their services.

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Q.14 What do you understand by named routes in Laravel

Named routes is an important feature in the Laravel framework. It allows you to refer to the routes when generating URLs or redirects to the specific routes. In short, we can say that the naming route is the way of providing a nickname to the route.

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Q.15 What are route group in Laravel

Route Groups is an essential feature in Laravel, which allows you to group all the routes. Routes Groups are beneficial when you want to apply the attributes to all the routes. If you use route groups, you do not have to apply the attributes individually to each route; this avoids duplication.

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Q.16 What is Middleware in Laravel

Middleware provide a convenient mechanism for inspecting and filtering HTTP requests entering your application. For example, Laravel includes a middleware that verifies the user of your application is authenticated. All of these middleware are located in the app/Http/Middleware directory.

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Q.17 What is dependency Injection in Laravel

In Laravel, dependency injection is the process of injecting class dependencies into a class through a constructor or setter method. This allows your code to look clean and run faster. Dependency injection involves the use of a Laravel service container, a container that is used to manage class dependencies.

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Q.18 What are collections in Laravel

A collection is a laravel class that uses arrays internally and adds many features to them. You can create a collection simply by using collect method like this.

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Q.19 What are contracts in Laravel

Laravel contracts are a set of interfaces with various functionalities and core services provided by the framework. For example, Illuminate\Contracts\Queue\Queue contract uses a method which is needed for queuing jobs and Illuminate\Contracts\Mail\Mailer uses the method for sending emails.

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Q.20 What are queues in Laravel

Laravel queues provide a unified API across a variety of different queue backends, such as Beanstalk, Amazon SQS, Redis, or even a relational database. Queues allow you to defer the processing of a time consuming task, such as sending an email, until a later time.

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Q.21 What are accessors and mutators in Laravel

Laravel Accessors and Mutators are custom, user defined methods. Accessors are used to format the attributes when you retrieve them from database. Whereas, Mutators are used to format the attributes before saving them into the database.

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Q.22 How will you register service providers in Laravel?

All service providers are registered in the config/app. php configuration file. This file contains a providers array where you can list the class names of your service providers. By default, a set of Laravel core service providers are listed in this array.

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Q.23 What do you understand by Composer in Laravel

In Laravel, the composer is a tool that includes all the dependencies and libraries. It helps the user to develop a project with respect to the mentioned framework. Third-party libraries can be installed easily using composer. Composer is used to managing its dependencies and the dependencies are noted in composer.

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Q.24 What is the templating engine used in Laravel

Blade is the simple, yet powerful templating engine that is included with Laravel. Blade does not restrict you from using plain PHP code in your templates.

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Q.25 What do you understand by artisan in Laravel

Artisan is the name of the command-line interface included with Laravel. It provides a number of helpful commands for your use while developing your application. It is driven by the powerful Symfony Console component.

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Q.26 What are the default route files in Laravel

The routes/web.php file defines routes that are for your web interface. These routes are assigned the web middleware group, which provides features like session state and CSRF protection. The routes in routes/api.php are stateless and are assigned the api middleware group.

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Q.27 What do you understand by migrations in Laravel

Migrations are like version control for your database, allowing a team to easily modify and share the application's database schema. Migrations are typically paired with Laravel's schema builder to easily build your application's database schema.

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Q.28 What do you understand by seeders in Laravel

Laravel includes the ability to seed your database with data using seed classes. All seed classes are stored in the database/seeders directory. By default, a DatabaseSeeder class is defined for you. From this class, you may use the call method to run other seed classes, allowing you to control the seeding order.

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Q.29 What do you understand by factories in Laravel

Laravel has a feature called model factories that allows you to build fake data for your models. It is very useful for testing and seeding fake data into your database to see your code in action before any real user data comes in.

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Q.30 How to implement soft delete in Laravel

Soft deleting the data allows you to easily restore the data with minimal work and can be a huge time saver when a user accidentally deletes some data. Laravel provides support for soft deleting using the Illuminate\Database\Eloquent\SoftDeletes trait.

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Q.31 Explain Models in Laravel

A Model is basically a way for querying data to and from the table in the database. Laravel provides a simple way to do that using Eloquent ORM (Object-Relational Mapping). Every table has a Model to interact with the table.

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Q.32 Detail about Relationships in Laravel

Eloquent relationships are defined as methods on your Eloquent model classes. Since relationships also serve as powerful query builders, defining relationships as methods provides powerful method chaining and querying capabilities. There are three different types of relationships: One to one. One to many. Many to many.

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Q.33 What is Eloquent in Laravel

Laravel includes Eloquent, an object-relational mapper (ORM) that makes it enjoyable to interact with your database. In addition to retrieving records from the database table, Eloquent models allow you to insert, update, and delete records from the table as well.

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Q.34 What do you understand by throttling in Laravel

We use throttling in Laravels API middleware group to help prevent excessive connections to the API routes. It's also a great way to throttle things like comments if you don't want users posting them one after another or to help prevent brute force attacks.

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Q.35 What is Laravel?

Laravel is a PHP-based open-source web application framework that follows the Model-View-Controller (MVC) architecture. It provides developers with an elegant syntax and modular structure to build robust, scalable, and secure web applications quickly and easily.

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Q.36 What is Artisan in Laravel?

Artisan is the command-line interface (CLI) included with Laravel. It provides a set of pre-built commands that can be used to perform common tasks like generating boilerplate code, managing database migrations, and running unit tests.

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Q.37 What is Blade in Laravel?

Blade is Laravel's templating engine that allows developers to write clean, concise, and expressive view files. It provides a simple syntax for declaring placeholders, loops, conditions, and partials in the HTML markup.

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Q.38 What is Routing in Laravel?

Routing in Laravel refers to the process of mapping HTTP requests to the appropriate controller actions. It allows developers to define the URLs and HTTP methods that the application should respond to, as well as any parameters that need to be passed along with the request.

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Q.39 What is Middleware in Laravel?

Middleware in Laravel is a mechanism that allows developers to intercept and modify incoming HTTP requests before they are passed on to the controller. It provides a way to add additional functionality to the application, such as authentication, logging, or caching.

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Q.40 What is Eloquent in Laravel?

Eloquent is Laravel's built-in ORM (Object-Relational Mapping) system that provides a simple and intuitive way to interact with the database. It allows developers to define database tables as PHP classes and provides a range of powerful methods for querying and manipulating data.

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Q.41 What is the purpose of CSRF protection in Laravel?

Cross-Site Request Forgery (CSRF) protection in Laravel is a security mechanism that helps to prevent unauthorized access to the application. It works by generating a unique token for each request, which is then validated to ensure that the request is coming from a legitimate source.

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Q.42 What is the purpose of the .env file in Laravel?

The .env file in Laravel is a configuration file that contains environment-specific settings for the application, such as database credentials, mail server details, and application URLs. It allows developers to easily switch between different environments, such as local development, staging, and production.

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Q.43 What is the purpose of the service container in Laravel?

The service container in Laravel is a powerful dependency injection system that provides a way to manage the application's dependencies and instantiate objects dynamically. It allows developers to decouple their code and make it more modular, testable, and maintainable.

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Q.44 What is the difference between Session and Cookie in Laravel?

Session and Cookie in Laravel are two different ways to store data on the client-side. Session is used to store data that is specific to a user's session, such as login credentials, shopping cart items, or form data. Cookie, on the other hand, is used to store data that needs to persist across multiple sessions, such as a user's language preference or theme settings.

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Q.45 What is the purpose of Service Providers in Laravel?

Service Providers in Laravel are responsible for registering and bootstrapping various components of the application, such as routes, views, database connections, and event listeners. They allow developers to organize their code into modules and provide a convenient way to add or remove functionality from the application.

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Q.46 What is the difference between Route::get() and Route::post() in Laravel?

Route::get() and Route::post() are two different HTTP methods used in Laravel routing. Route::get() is used to handle HTTP GET requests, while Route::post() is used to handle HTTP POST requests. GET requests are typically used to retrieve data from the server, while POST requests are used to submit data to the server.

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Q.47 What is the purpose of the Request object in Laravel?

The Request object in Laravel represents the current HTTP request and provides a range of methods for retrieving data from the request, such as input parameters, headers, cookies, and files. It allows developers to access and manipulate incoming data in a standardized way.

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Q.48 What is the purpose of the Response object in Laravel?

The Response object in Laravel represents the HTTP response sent back to the client and provides a range of methods for setting headers, cookies, and content. It allows developers to customize the response based on the request, such as returning different data formats or status codes.

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Q.49 What is the purpose of Queues in Laravel?

Queues in Laravel are a way to defer long-running or resource-intensive tasks, such as sending emails, processing images, or generating reports, to a background process. They allow developers to improve the performance and scalability of the application by offloading work to a separate queue worker process.

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Q.50 What is the purpose of Events and Listeners in Laravel?

Events and Listeners in Laravel are a way to decouple different parts of the application and provide a convenient way to handle application-level events, such as user registration, password reset, or order placed. Events represent an occurrence in the application, while Listeners are responsible for responding to that event.

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Q.51 What is the purpose of Notifications in Laravel?

Notifications in Laravel provide a way to send customizable and context-specific messages to users via various channels, such as email, SMS, Slack, or database. They allow developers to build a flexible and modular notification system that can be easily customized and extended.

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Q.52 What is the purpose of Blade Directives in Laravel?

Blade Directives in Laravel provide a way to extend the functionality of Blade templates by defining custom directives, such as @ifauth, @form, or @markdown. They allow developers to write more expressive and reusable templates that are easier to read and maintain.

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Q.53 What is the purpose of the Model-View-ViewModel (MVVM) pattern in Laravel?

The Model-View-ViewModel (MVVM) pattern in Laravel is a variant of the MVC architecture that separates the presentation logic into a separate ViewModel layer. It allows developers to write more modular and testable code by reducing the coupling between the Model and View layers.

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Q.54 What is the purpose of Middleware Groups in Laravel?

Middleware Groups in Laravel provide a way to group and apply middleware to a set of routes, such as authentication, CSRF protection, or rate limiting. They allow developers to simplify the configuration of middleware and reuse it across multiple routes.

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Q.55 What is the difference between Eloquent and Query Builder in Laravel?

Eloquent is an ORM (Object-Relational Mapping) provided by Laravel that allows developers to interact with the database using an object-oriented syntax. Query Builder, on the other hand, is a fluent interface provided by Laravel that allows developers to build SQL queries using method chaining.

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Q.56 What is the purpose of Accessors and Mutators in Laravel?

Accessors and Mutators in Laravel are methods that allow developers to get and set model attributes in a customized way, such as formatting dates, encrypting passwords, or converting JSON strings. They allow developers to abstract away the underlying data structure and provide a consistent interface to the application.

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Q.57 What is the purpose of Artisan in Laravel?

Artisan is the command-line interface provided by Laravel that allows developers to perform various tasks, such as generating code, running database migrations, clearing caches, or creating cron jobs. It provides a convenient way to automate common tasks and streamline the development process.

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Q.58 What is the purpose of Contracts in Laravel?

Contracts in Laravel are a set of interfaces that define the API for various components of the application, such as the database, cache, queue, or mail. They allow developers to write code that is compatible with different implementations and provides a standardized way to interact with the application.

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Q.59 What is the purpose of Route Model Binding in Laravel?

Route Model Binding in Laravel is a way to automatically inject model instances into the controller methods based on the route parameters. It allows developers to write more concise and expressive code by eliminating the need to manually retrieve the model from the database.

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Q.60 What is the purpose of the Event Dispatcher in Laravel?

The Event Dispatcher in Laravel is a central mechanism for broadcasting and handling events within the application. It allows developers to trigger events from different parts of the application and handle them using registered listeners in a decoupled and flexible way.

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Q.61 What is the purpose of the Console Kernel in Laravel?

The Console Kernel in Laravel is responsible for defining the list of commands available in the Artisan CLI and scheduling console commands to run at specific intervals using Cron syntax. It provides a way to automate repetitive tasks and run background jobs in a controlled environment.

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