Top 20 Laravel Interview questions and answers

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If you are a laravel developer or want to start your development career with PHP Laravel framework then in this post I have compiled Top 20 Laravel Interview questions and answers which help you during interview. following are compiled list of Laravel interview questions and answer. If Laravel is an engineer’s PHP framework of choice, they definitely have potential to be a good candidate, but a lot of new PHP engineers have been into Laravel too. The framework itself is very welcoming to newcomers, which makes it easy for beginners to feel that they know more than they really do.

Top 20 Laravel Interview questions and answers

Here is the list of top most ask-able Laravel Interview questions and answers

Question: What is Laravel?

Laravel is free open source “PHP framework” based on MVC design pattern .
It is created by Taylor Otwell. Laravel provides expressive and elegant syntax that helps in creating a wonderful web application easily and quickly.

Question: What version of Laravel do you generally use?

The current version is 5.1.x which has been named LTS. Before 5.x was released, 4.2 was the version a lot of people used. It doesn’t matter exactly which version they used (although 5.1.x is a better answer to hear), but it’s nice to hear how they talk about the different versions.

If they say they used to use 4.x but now use 5.x here are some potential questions:

  • Do you like the new folder structure introduced in 5.0?
  • Did you migrate any existing 4.x applications to 5.x? If yes, tell me about that.

Question: What is Laravel Horizon?

Laravel Horizon provides a beautiful dashboard and code-driven configuration for your Redis queues.

Question: What is Server Requirements for Laravel 5.4 ?

  • PHP >= 7.1.3
  • OpenSSL PHP Extension
  • PDO PHP Extension
  • Mbstring PHP Extension
  • Tokenizer PHP Extension
  • XML PHP Extension
  • Ctype PHP Extension
  • JSON PHP Extension

Question: How to Install Laravel via Composer?

Bellow command you shoud use commandline to install laravel via composer

composer create-project --prefer-dist laravel/laravel myproject

Question: What is Laravel Dusk?

Laravel Dusk provides an expressive, easy-to-use browser automation and testing API. You’ll love it.

Question: Why Laravel over other PHP frameworks?

If they haven’t used other frameworks, that’s OK. If they answer that they haven’t used other frameworks then it’s important to dig deep into these questions. If they have used other frameworks, ask about the differences and see if they are passionate about Laravel or just have jumped on the bandwagon.

Question: Explain Events in laravel?

An event is an action or occurrence recognized by a program that may be handled by the program or code. Laravel events provides a simple observer implementation,that allowing you to subscribe and listen for various events/actions that occur in your application.
All Event classes are generally stored in the app/Events directory, while their listeners are stored in app/Listeners of your application.

Question: How to Install any Specific version of Laravel via Composer? 

#Command:
composer create-project --prefer-dist laravel/laravel <projectname> "<versionno.*>"
 
#Example: Install Laravel 5.4 using Composer
composer create-project --prefer-dist laravel/laravel blog "5.4.*"
</versionno.*></projectname>


Question: What is Laravel Echo?

Event broadcasting, evolved. Bring the power of WebSockets to your application without the complexity.

Question: Have you used Lumen before?

Lumen is the micro-framework by Laravel that was made by Taylor specifically for APIs and microservices. If they’ve decided to use Lumen over Larvel for a microservice or API, it shows that they care about performance.

Question: I just have installed a fresh version of Laravel 5, and I have the white screen of death. What’s wrong?

It’s a permissions problem. If there was a PHP problem you’d recieve a verbose message (unles debug mode was set to false) explaining the problem. Almost everyone who has used Laravel has had this permissions error at some point, but even if they have not, they should be able to figure out that there’s a permissions error.

Question: What is Laravel service container?

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.

Question: What is Lumen?

  1. Lumen is a micro-framework provided by Laravel.
  2. It is developed by creator of Laravel Taylor Otwell.
  3. It is mostly used for creating RESTful API’s & microservices.
  4. Lumen is built on top components of Laravel.


Question: How to Install Lumen via Composer? 

composer create-project --prefer-dist laravel/lumen myproject

Question: What is Binding?

Within a service provider, we always have access to the container via the $this->app property. We can register a binding using the bind method, passing the class or interface name that we wish to register along with a Closure that returns an instance of the class:

$this->app->bind(‘HelpSpot\API’, function ($app) {
return new HelpSpot\API($app->make(‘HttpClient’));
});

Question: What is ORM?

Object-relational Mapping (ORM) is a programming technique that help in converting data between incompatible type systems into object-oriented programming languages.

Question: Which Template Engine used by Laravel?

Blade is the simple, yet powerful templating engine provided with Laravel

Question: Explain Binding Primitives?

Sometimes you may have a class that receives some injected classes, but also needs an injected primitive value such as an integer. You may easily use contextual binding to inject any value your class may need:

$this->app->when(‘App\Http\Controllers\UserController’)
->needs(‘$variableName’)
->give($value);

Question: Explain Contextual Binding and how does it work?

Sometimes you may have two classes that utilize the same interface, but you wish to inject different implementations into each class. For example, two controllers may depend on different implementations of the Illuminate\Contracts\Filesystem\Filesystem contract. Laravel provides a simple, fluent interface for defining this behavior:

use Illuminate\Support\Facades\Storage;
use App\Http\Controllers\PhotoController;
use App\Http\Controllers\VideoController;
use Illuminate\Contracts\Filesystem\Filesystem;
 
$this->app->when(PhotoController::class)
->needs(Filesystem::class)
->give(function () {
return Storage::disk(‘local’);
});
 
$this->app->when(VideoController::class)
->needs(Filesystem::class)
->give(function () {
return Storage::disk(‘s3’);
});


Question: How to enable maintenance mode in Laravel 5 ?

When your application is in maintenance mode, a custom view will be displayed for all requests into your application. This makes it easy to “disable” your application while it is updating or when you are performing maintenance. A maintenance mode check is included in the default middleware stack for your application. If the application is in maintenance mode, a MaintenanceModeException will be thrown with a status code of 503.
You can enable maintenance mode in Laravel 5, simply by executing below command.

// Enable maintenance mode
php artisan down
//  You may also provide a message and retry options to the down command.
// Disable maintenance mode
php artisan up

Question: What is the make Method?

You may use the make method to resolve a class instance out of the container. The make method accepts the name of the class or interface you wish to resolve:

$api = $this->app->make(‘HelpSpot\API’);

Question: Where do you regiser service providers?

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.

Question: What is Route Model Binding?

When injecting a model ID to a route or controller action, you will often query to retrieve the model that corresponds to that ID. Laravel route model binding provides a convenient way to automatically inject the model instances directly into your routes.

Question: How to get current environment in Laravel 5 ? 

$environment = App::environment();

Question: What is Middleware?

Middleware provide a convenient mechanism for filtering HTTP requests entering your application.

Question: What is Response in Laravel?

All routes and controllers should return a response to be sent back to the user’s browser. Laravel provides several different ways to return responses. The most basic response is returning a string from a route or controller. The framework will automatically convert the string into a full HTTP response:

Route::get(‘/’, function () {
return ‘Hello World’;
});

Question: Which class is used to handle exceptions?

Laravel exceptions are handled by App\Exceptions\Handler class.

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