Laravel 9 Interview Questions and Answers in 2022 (Part #1) - Codexashish
Tags: laravel, php, programming, beginners
Published: 2022-03-05 11:13:54

## Laravel 9 Interview Questions and Answers in 2022 (Part #1)

## 
[Laravel 9 Interview Questions and Answers in 2022 (Part #1) - Codexashish](https://www.codexashish.com/2021/12/laravel-8-interview-questions-and.html)

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[Laravel 9 Interview Questions and Answers in 2022 (Part #2) - Codexashish](https://www.codexashish.com/2021/12/laravel-8-interview-questions-and_22.html)

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[Advance Laravel 9 Interview Questions and Answers 2022 | Laravel Interview Questions and Answers - Codexashish](https://www.codexashish.com/2021/12/advance-laravel-8-interview-questions.html)


## Q. 1: What is “laravel”?
 Laravel is a free, open-source PHP web framework,
 Created by Taylor Otwell
 Intend for the development of web application
 Laravel follows model–view–controller (MVC) architectural pattern


## Q. 2: What are the benefits of Laravel over other Php frameworks? 
The setup and customization method is straightforward and quick as compared to others.
intrinsic Authentication System.
Supports multiple file systems.
Pre-loaded packages like Laravel personages, Laravel cashiers, Laravel elixir, Passport, Laravel Scout.
smooth-spoken ORM (Object Relation Mapping) with PHP active record implementations.
in-built instruction tool “Artisan” for creating a code skeleton, database structure, and building their migrations.
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## Q. 3: Explain Migrations in Laravel!
Laravel migrations: 

Laravel Migrations unit-like version management for the data, allowing a team to easily modify and share the application’s data schema. Migrations unit is typically paired with Laravel’s schema builder to easily build the application’s data schema.

Ex : 2021_07_24_000000_create_users_table

php artisan migrate:fresh.

php artisan migrate:install.

php artisan migrate:refresh.

php artisan migrate:reset.

php artisan migrate:rollback.

php artisan migrate:status.



## Q. 4: What is the Facade Pattern used in Laravel?
Facades offer a static interface to categories that square measure offered within the application's service instrumentation. Laravel facades function static proxies to underlying categories within the service instrumentation, providing the good thing about a laconic, communicative syntax whereas maintaining a lot of testability and suppleness than ancient static ways.

Laravel façade pattern:

All of Laravel's facades square measure outlined within the Illuminate\Support\Facades namespace.

use Illuminate\Support\Facades\Cache;

Cache::get('key’)     		 DB::table('table_name')->get(); 



## Q. 5: What is Service Container?
Laravel service container: 

The Laravel service instrumentation could be a tool for managing category dependencies and activity dependency injection. You outline however an object ought to be created in one purpose of the appliance (the binding) and each time you wish to make a brand new instance, you only raise it to the service instrumentation, and it'll produce it for you, beside the desired dependencies

//every time we need YourClass we should pass the dependency manually

$instance = new YourClass($dependency);  


$instance = App::make( YourClass::class );



## Q. 6: What are Laravel events?
Laravel events: 

Laravel event provides an easy observer pattern implementation, that enables to subscribe and listen for an event within the application. an occasion is an occasion or occurrence detected and handled by the program.

Below are the event examples in Laravel:

        A new user has registered
        A new comment is posted
        User login/logout
        The new product is added.


## Q. 7: What do you know about query builder in Laravel explain it?
The Laravel query builder: 

Laravel's information question builder provides a convenient, fluent interface to making and running information queries. It is accustomed perform most information operations in your application and works on all supported information systems.

Laravel question builders use PDO parameters binding to protect your applications against SQL injection attacks. there's no have to be compelled to clean strings being passed as bindings.

Some QB features:

Chunking , Aggregates ,  Selects, Raw Expressions,  Joins
Unions
Where
Ordering, Grouping, Limit, & Offset


## Q. 8: How do you generate migrations?
Laravel generate migrations:

Migrations square measure like version management for your information, permitting your team to simply modify and share the application's information schema. Migrations unit typically paired with Laravel's schema builder to easily build your application's data schema.

To create a migrations, use the make:- migration Artisan command:

The new migration are going to be placed in your database/migrations directory. every migrations files name contains a timestamp that permits Laravel to work out the order of the migrations.

php artisan make:migration create_users_table



## Q. 9: What is the benefit of eager loading, when do you use it?
Laravel eager loading:

When accessing smooth-spoken relationships as properties, the connection knowledge is "lazy loaded". this suggests the connection knowledge isn't really loaded till you initially access the property. However, smooth-spoken will "eager load" relationships at the time you question the parent model.

Eager loading alleviates the N + one question downside after we have nested objects (like post -> comments). we will use eager loading to scale back this operation to simply a pair of 2 queries.

## Q. 10: How do you do soft deletes?
Laravel soft delete:

When models square measure soft deleted, they're not really far from your information. Instead, a timestamp is about on the deleted_at column. If a model encompasses a non-null deleted_at price, the model has been soft deleted.

In Migrations:

$table->softDeletes();

In model:-





Conclusion:
Laravel 9 Interview Questions and Answers | Laravel 9 Interview Questions and Answers

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