55 Laravel interview questions with answers

All Laravel interview questions

• What is Laravel and what problems does it solve?

• What is routing in Laravel and how do you define routes?

• What is the Blade templating engine?

• What are Laravel migrations and how do you use them?

• What is the MVC pattern and how does Laravel use it?

• What is Artisan and what are some common commands?

• What are Laravel controllers and what do they do?

• What is dependency injection in Laravel?

• What is a service provider in Laravel?

• What are Laravel validation rules and how do you validate form data?

• What is Eloquent ORM and why is it better than raw SQL?

• What are Laravel models and how do you create them?

• What are Eloquent relationships and what types exist?

• What is the N+1 query problem and how do you fix it?

• What are query scopes in Laravel?

• What are accessors and mutators in Eloquent?

• What is soft delete in Laravel?

• What are database factories and seeders in Laravel?

• What is a query builder in Laravel and what are its advantages?

• What is the Laravel service container and how does it work?

• What are Laravel events and how do you use them?

• What are Laravel queues and why use them?

• What is middleware in Laravel and how do you create custom middleware?

• What is broadcasting in Laravel and when do you use it?

• What are Laravel policies and how do you authorize actions?

• What is Laravel testing and what are the main testing types?

• What is the Laravel facade pattern?

• What are Laravel collections and how do you use them?

• What is Laravel Reverb and how does it differ from Pusher?

• What is Laravel Pennant and how does it enable feature flag management?

• What is Pest and why should new Laravel projects use it over PHPUnit?

• What is the difference between Sanctum and Passport for API authentication?

• What are API Resources in Laravel and why not return raw model data?

• What are DTOs (Data Transfer Objects) and how do they improve code architecture?

• What is architecture testing in Laravel with Pest and why is it important?

• What is the difference between feature tests and unit tests in Laravel?

• What is Livewire 3 and how does it change Laravel full-stack development?

• What is CSRF and how do you prevent it (including Laravel’s `@csrf`)?

• What is the Repository pattern in Laravel/PHP?

• How does caching work in Laravel (stores, tags)?

• What is task scheduling in Laravel?

• How do file upload and storage work in Laravel?

• How do `register()` and `boot()` differ in a service provider? What breaks if you mix them up?

• What is a Form Request? Why prefer it over calling `$request->validate()` inside the controller?

• How do `bind`, `singleton`, `scoped`, and `instance` differ in the service container? When do you use each?

• How does route model binding work? How do you bind by `slug` and avoid exposing another user's data?

• What is a polymorphic relationship in Eloquent? When do you use it and what are its downsides?

• How does `hasManyThrough` differ from `belongsToMany`? Give a practical example.

• When do you use built-in casts, `Attribute` accessors, and custom casts in Eloquent? How do they differ?

• How does Laravel handle a failing queue job? How do `tries`, `backoff`, `retryUntil`, and `failed()` work?

• How does an Observer differ from Events/Listeners? When do you pick each?

• Design a stock-deduction flow when many users order at once: how do you use transactions and locking to avoid overselling?

• How do you catch N+1 queries before production? How does `preventLazyLoading` work?

• How do you handle duplicate job dispatches (double-clicked buttons, overlapping cron runs)? How does `ShouldBeUnique` differ from `WithoutOverlapping`?

• Why does code work locally but `env('API_KEY')` return `null` in production?