Laravel Interview Cheatsheet

Laravel Interview Cheatsheet

Problem Statement

As a Laravel developer, it is common to come across various interview questions related to Laravel framework. Having a cheatsheet that covers frequently asked questions and their answers can be immensely helpful in preparing for interviews and showcasing your expertise in Laravel.

Use Cases

• Job Seekers: Candidates can use this cheatsheet to brush up their Laravel knowledge before appearing for interviews and increase their chances of getting hired.
• Interviewers: Employers can use this cheatsheet as a reference guide while screening and evaluating candidates during Laravel interviews. It provides a structured approach to assessing a candidate’s proficiency in Laravel.

1. What is Laravel?

Laravel is an open-source PHP framework that follows the Model-View-Controller (MVC) architectural pattern. It provides a robust set of tools and features for web application development, making it popular among developers.

2. What is an ORM?

ORM stands for Object-Relational Mapping. Laravel uses an ORM called Eloquent, which allows developers to work with databases using an object-oriented approach. It makes database interactions more intuitive and efficient.

// Example Eloquent Query
$users = User::where('age', '>', 18)->get();

3. How do you define routes in Laravel?

Routes in Laravel are defined in the routes/web.php or routes/api.php file. You can use the Route facade to define routes for various HTTP methods.

// Example Route Definition
Route::get('/users', 'UserController@index');

4. What is Blade?

Blade is Laravel’s templating engine that allows you to write clean and concise templates for your views. It provides features like template inheritance, conditionals, loops, and includes for building dynamic web pages.

<!-- Example Blade Template -->
@if(Auth::check())
    <p>Welcome, {{ Auth::user()->name }}</p>
@else
    <p>Please log in to continue.</p>
@endif

5. How does Laravel handle authentication?

Laravel provides a built-in authentication system that makes it easy to handle user authentication, registration, and password reset functionality. It includes pre-built controllers, views, and routes for managing authentication.

// Example Authentication Routes
Auth::routes();

// Example Protecting Routes
Route::middleware('auth')->group(function () {
    // Protected Routes
});

6. What are Middleware in Laravel?

Middleware are a series of filters that can be applied to HTTP requests in Laravel. They allow you to perform actions before or after a request is handled, such as authentication, authorization, and request modification.

// Example Middleware
Route::get('/dashboard', 'DashboardController@index')->middleware('auth');

7. What is Laravel’s ORM?

Laravel’s ORM (Object-Relational Mapping) is Eloquent. It provides a simple and expressive ActiveRecord implementation for working with databases. It allows you to interact with database tables using PHP objects and query builders.

// Example Eloquent Model
class User extends Model
{
    protected $table = 'users';
}

8. How do you handle form validation in Laravel?

Laravel provides a convenient way to validate incoming form requests using form request validation. You can define validation rules in the form request class and Laravel takes care of validating the incoming request data.

// Example Form Request Validation
class StoreUserRequest extends FormRequest
{
    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        return [
            'name' => 'required',
            'email' => 'required|email',
            'password' => 'required|min:8',
        ];
    }
}

9. What are some Laravel best practices?

• Use Laravel’s built-in features like routing, ORM, and authentication to leverage the framework’s functionality.
• Follow the MVC architectural pattern to separate concerns and keep your code clean and maintainable.
• Utilize caching and database optimization techniques to improve application performance.
• Write clean and well-documented code, following coding standards and best practices.
• Regularly update Laravel and its dependencies to benefit from security patches and new features.

10. How can you improve the performance of a Laravel application?

• Optimize database queries by utilizing indexes, eager loading, and caching.
• Use efficient data structures and algorithms in your code.
• Enable opcode caching in PHP.
• Utilize HTTP caching techniques such as cache control headers and content caching.
• Implement a distributed caching system like Redis or Memcached for session and query caching.

Conclusion

This Laravel interview cheatsheet provides a comprehensive overview of commonly asked Laravel interview questions and their answers. It covers topics like Laravel basics, ORM, routing, Blade templating, authentication, middleware, and best practices. By familiarizing yourself with these questions and their answers, you’ll be well-prepared for your Laravel interviews and increase your chances of success.

Categories: Laravel, Interview Preparation, Web Development