LARAVEL Laravel 5

Question 1

What is the N+1 query problem in Laravel Eloquent, and how is it solved?

Accepted Answer

Loading related models in a loop causes one query per record; solved with eager loading using with()

Answer

Without eager loading, fetching a relationship inside a loop triggers a new query per record; `with('relation')` resolves all related models in a single additional query.

Question 2

In Laravel, what is a 'policy' used for?

Accepted Answer

Authorizing user actions on specific Eloquent models

Answer

Policies are classes that organize authorization logic for a model (e.g., `PostPolicy`) and are used with `$this->authorize()` or the `@can` Blade directive.

Question 3

Which Blade directive conditionally displays content only to authenticated users?

Accepted Answer

@auth

Answer

`@auth` renders its content block only when a user is authenticated, while `@guest` is the inverse for unauthenticated visitors.

Question 4

What does `php artisan tinker` provide?

Accepted Answer

An interactive REPL shell with full access to the Laravel application environment

Answer

Tinker uses PsySH to provide a REPL where you can interact with your models, services, and the full application without writing a temporary script.

Question 5

In Laravel broadcasting, what is the purpose of the `ShouldBroadcast` interface on an event?

Accepted Answer

Marks the event to be broadcast over WebSocket channels when fired

Answer

Implementing `ShouldBroadcast` on an event tells Laravel to broadcast the event payload to the specified channel(s) via the configured driver (Pusher, Ably, or Laravel WebSockets).

LARAVEL - Laravel PHP Framework Practice Test

LARAVEL - Laravel PHP Framework Practice Test

LARAVEL Laravel 5