Laravel Interview Questions Tutorial

Introduction

• Presenter: Iamin
• Channel: Webtech Knowledge
• Topic: Laravel interview questions (Beginner to Advanced)
• Content covers ~20+ questions likely in interviews, with a focus on key areas to expect.

Beginner Questions

What is Laravel?

• Free, open-source PHP web framework
• Follows the Model-View-Controller (MVC) architecture

Benefits of Laravel over Other Frameworks

• Inbuilt authentication system
• Support for multiple file systems
• Eloquent ORM (Object Relation Mapping)
• Preloaded packages: Laravel Socialite, Laravel Cashier, Passport, and Laravel Scout
• Artisan commands for database and structure

Explain Migrations in Laravel

• Version control for the database
• Command to generate migration: php artisan make:migration [table_name]

Packages Provided by Laravel

• Cashier: Subscription-based billing
• Passport: API authentication
• Scout: Full-text search
• Socialite: Login using Facebook, Twitter, Google, etc.

Implementing Soft Delete in Laravel

• Soft delete: Doesn't display data but keeps it in the database
• Use use SoftDeletes in the model
• Add table->softDeletes() in the migration

Request Validation in Laravel

• Use request->validate() method
• Define rules for fields like title, email, password, etc.

Artisan Command Line Tool

• Used to create controllers, models, migrations, seeders, factories, policies, etc.
• Example: php artisan make:controller [ControllerName]

Full Stack Development with Laravel

• Supports both frontend and backend development

Service Providers in Laravel

• Tools for dependency injection and management
• Commands: php artisan make:provider [ProviderName]
• Common functions: register(), boot()

Eloquent Object Relationship Mapper (ORM)

• Represents database tables as classes
• Binds object instances to specific table rows

Middleware in Laravel

• Verifications (e.g., user authentication, user type)
• Command: php artisan make:middleware [MiddlewareName]
• Register middleware in kernel.php

Verify CSRF Token

• Class: VerifyCsrfToken extends BaseVerifier
• Protects against CSRF attacks by default
• Specify routes to bypass CSRF check using protected $except

Traits in Laravel

• Allows methods to be reused across independent classes
• Example usage: class Post { use Sharable; }

Throttling in Laravel

• Limits the number of requests from a specific IP
• Helps prevent DDoS attacks

Aggregate Methods in Query Builder

• Methods: count, max, min, avg, sum

Routing in Laravel

• Maps requests to controller functions

Declaring Global Variables

• Defined in .env file or config.php

Seeding in Laravel

• Inserting test data into the database

Supported Databases

• MySQL, PostgreSQL, SQLite, SQL Server

File Validation

• Example: Required file types and size limits

Advanced Questions

Purpose of Sessions

• Store data and keep track of users

CSRF Token

• Protects against CSRF attacks
• Included in forms for security

GET vs POST Methods

• GET: Retrieve data
• POST: Submit data to the database

Common Status Codes

• 401: Unauthorized
• 402: Payment required
• 403: Forbidden
• 404: Not found
• 500: Internal server error
• 501: Not implemented
• 503: Service unavailable

Sending Emails in Laravel

• Tools: Mailtrap, Mailgun, Postmark, Swift Mailer

Clearing Cache

• Commands:
  • php artisan config:clear
  • php artisan cache:clear
  • composer dump-autoload
  • php artisan route:clear

Database Configuration

• Defined in .env file

Generating Application Key

• Command: php artisan key:generate

Extending Login Expiration

• Update lifetime variable in config/session.php

Rolling Back Migrations

• Command: php artisan migrate:rollback --step=1

Checking Current Route Name

• Command: request()->route()->getName()

Conclusion

• Tutorial aims to prepare for Laravel interviews
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