Question 1

Why would you choose Laravel over other PHP frameworks like Symfony or CodeIgniter?

Accepted Answer

Laravel offers an elegant syntax, built-in tools like authentication, ORM, and queues, and a friendlier learning curve. It's ideal when seeking development speed without sacrificing structure.

Question 2

How does Laravel improve development speed compared to plain PHP?

Accepted Answer

It provides ready-to-use abstractions like routing, ORM, authentication, validation, and CLI (Artisan). This eliminates repetitive code and allows focusing on business logic.

Question 3

What is the role of Composer in a Laravel project?

Accepted Answer

Composer is PHP's dependency manager. In Laravel, it manages the installation of the framework, its packages, and class autoloading.

Question 4

When would you use a REST API with Laravel instead of an application with Blade?

Accepted Answer

A REST API is used when the frontend is independent, such as React, Vue, or a mobile app. Blade is suitable when Laravel also handles the presentation layer in monolithic applications.

Question 5

What advantage does Eloquent offer over writing SQL queries manually?

Accepted Answer

Eloquent allows interacting with the database using object-oriented models, which improves readability, reduces errors, and facilitates maintenance.

Question 6

How does Laravel decide which controller should handle an HTTP request?

Accepted Answer

Through the routing system defined in the routes/web.php or routes/api.php files, where URLs are mapped to specific controllers and methods.

Question 7

What problem do migrations solve in a development team?

Accepted Answer

They allow versioning the database schema alongside the source code, ensuring that all team members work with the same database structure.

Question 8

In what situation would you use Artisan to speed up development?

Accepted Answer

To generate repetitive code such as controllers, models, migrations, middlewares, or seeders with a single command, saving time and maintaining consistency.

Question 9

What is the difference between hasOne, hasMany, and belongsTo in Eloquent?

Accepted Answer

hasOne defines a one-to-one relationship. hasMany defines one-to-many. belongsTo is the inverse relationship and indicates that the current model contains the foreign key.

Question 10

What is eager loading and when would you use it?

Accepted Answer

It is loading relationships along with the main model in a single query using with(). It is used to avoid the N+1 problem, where multiple unnecessary queries are executed when iterating over records.

Question 11

How does a middleware differ from a policy in Laravel?

Accepted Answer

Middleware operates at the HTTP request level, ideal for authentication or throttling. Policies manage authorization at the specific model or resource level.

Question 12

What are Form Requests and why are they important?

Accepted Answer

They are dedicated classes for encapsulating validation rules outside the controller. They improve readability, allow reusing validations, and keep controllers clean.

Question 13

How do you develop a REST API in Laravel?

Accepted Answer

Routes are defined in routes/api.php, resource controllers are created, API Resources are used to transform responses, and authentication is managed with Sanctum or Passport.

Question 14

How does the dependency injection system work in Laravel?

Accepted Answer

The Service Container automatically resolves dependencies declared in constructors or methods, instantiating the necessary classes without doing it manually.

Question 15

What is the difference between the where, orWhere, and whereIn methods in Eloquent?

Accepted Answer

where adds AND conditions. orWhere adds OR conditions. whereIn filters records whose column matches any value from a given array.

Question 16

What is a Service Provider and when would you create your own?

Accepted Answer

It is a class that registers services in the container. You create your own when you need to configure bindings, singletons, or initialize services when the application boots.

Question 17

How would you structure a large Laravel application to keep it scalable?

Accepted Answer

By separating responsibilities with service layers, repositories, and action classes. Avoiding business logic in controllers and using modules for independent domains.

Question 18

When would you use jobs and queues in Laravel and what problem do they solve?

Accepted Answer

They are used for heavy tasks like sending emails, image processing, or external integrations. They allow responding quickly to the user and executing the work in the background.

Question 19

What caching strategies would you apply in a high-traffic Laravel application?

Accepted Answer

Caching frequent queries with Redis, caching routes and configuration with Artisan, and caching Blade views. Also HTTP response-level caching for public endpoints.

Question 20

How would you optimize Eloquent queries in an application with large data volumes?

Accepted Answer

Using eager loading, select() to fetch only necessary columns, chunking to process large datasets, and database indexes on frequently filtered columns.

Question 21

How would you implement an events and listeners system to keep components decoupled?

Accepted Answer

By dispatching events with Event::dispatch() when key actions occur and registering listeners in EventServiceProvider. It allows multiple modules to react without coupling to each other.

Question 22

What considerations would you have for deploying Laravel in a cloud environment with high availability?

Accepted Answer

Using queues on Redis or SQS, storage on S3, sessions and cache on external services, and configuration through environment variables. Horizontal scaling requires avoiding any local state.

Question 23

Overloading controllers with business logic

Accepted Answer

Controllers should delegate to services or action classes. A controller with extensive methods is a sign of poor separation of responsibilities.

Question 24

Not detecting or resolving the N+1 problem in Eloquent

Accepted Answer

Iterating over relationships without eager loading generates one query per record. It is one of the most common and avoidable performance problems in Laravel.

Question 25

Not justifying the choice of Sanctum vs Passport

Accepted Answer

Using Passport for a simple SPA or Sanctum for complex OAuth2 indicates a lack of judgment. Each tool has a clear and different use case.

Question 26

Ignoring the use of caching for expensive operations

Accepted Answer

Not caching frequent queries or heavy configurations directly impacts response time. Laravel facilitates caching with a unified API over multiple drivers.

Question 27

Not using Form Requests for validation

Accepted Answer

Validating directly in the controller works for small projects, but in real projects it hinders reusability, testing, and code readability.

Question 28

Not knowing the lifecycle of a request in Laravel

Accepted Answer

Not knowing the order in which middleware, service providers, and the kernel act reflects a lack of experience working with the framework in depth.

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