50 Laravel Interview Questions

1. What is Laravel?

Laravel is free to use, open-source web framework based on PHP. It is developed by Taylor Otwell. It supports the MVC (Model-View-Controller) architectural pattern. Laravel provides an expressive and elegant syntax, which is useful for creating a wonderful web application easily and quickly. The first version of Laravel was released on 9th June 2011.

2. What is routing?

Laravel routes are defined in route files, which are stored in the routes directory. These files are loaded by the MVC framework. The routes/web.php files define routes that are available for the web interface. Those routes are allotted as the web middleware group, which provides features such as session state and CSRF protection. The routes available in routes/api.php are stateless and are allotted as the API middleware group. For most of the applications, one should start by defining routes in routes/web.php file.

3. Is Laravel support caching?

Yes, Laravel provides support for popular caching backends like Memcached and Redis.By default, Laravel is configured to use a file cache driver, which is used to store the serialized or cached objects in the file system.

4. What's useful by Unit testing?

Unit testing is built-in testing provided as an integral part of Laravel. It consists of unit tests that detect and prevent regressions in the framework. Unit tests can be run through the available artisan command-line utility.

5. Explain Events in laravel?

An event is an action or occurrence recognized by a program that may be handled by the program or code. Laravel events provide a simple observer implementation, that allowing you to subscribe and listen for various events/actions that occur in your application.

6. What is laravel eloquent?

Eloquent is the very powerful and expressive ORM or Object Relational Mapper in Laravel. If you know how to work with Objects in PHP, then you know how to use Eloquent! Well, it’s not *quite* that simple, but we do have the most expressive syntax yet in PHP for working with Models by way of Eloquent.

7. What is a facade in Laravel?

A facade is a class wrapping a complex library to provide a simple and more readable interface to it. The facade pattern is a software design pattern that is often used in an object-oriented programming language.

8. What is a trait in laravel?

Traits are a mechanism for code reuse in single inheritance languages such as PHP. A Trait is intended to reduce some limitations of single inheritance by enabling a developer to reuse sets of methods freely in several independent classes living in different class hierarchies.

9. Tell some about reverse routing in laravel?

Laravel Reverse routing is the process of generating the URL based on name or symbol. It generates URL's based on route declarations. Reverse routing makes your application so much more flexible and helps the developer to write cleaner codes in View. It defines a relationship between links and Laravel routes.

10. Explain Few words of Implicit Controller.

Implicit Controllers helped you to define a real route to handle controller action. You can define them in route.php file with Route:: controller() method.

11. What is the Laravel API rate limit?

Laravel 5.7. 15 and the API works but is by default limiting to 60 calls a minute. But when I try to limit my API to 7000 requests per minute it still only allows 60 requests.

12. What is a facade in Laravel?

A Laravel facade is a class that provides a static-like interface to services inside the container. These facades, according to the documentation, serve as a proxy for accessing the underlying implementation of the container's services.

13. What is Laravel Forge?

A forge is a tool that helps in organizing and designing a web application. Although the manufacturers of the Laravel framework developed it, it can automate the deployment of every web application that works on a PHP server.

14. What is ORM?

Object-relational mapping (ORM) is a programming technique that helps in converting data between incompatible type systems into object-oriented programming languages.

15. What is the purpose of using dd() function in laravel?

dd() – Stands for "Dump and Die"Laravel's dd() is a helper function, which will dump a variable's contents to the browser and halt further script execution.

16. How to make a helper file in laravel?

Make a helper file in laravelCreate helpers.php File. after doing this we need to create helper. php in the laravel project inside the app directory. Update the below-given code into your file. after thatAdd File Path In composer. json File. In this second step, you will add the path of the helpers file in the composer.json file.

17. What is HTTP middleware?

Middleware is another essential component of Laravel and provides the method to filter HTTP requests that get entered into your project. Let us assume a situation where this middleware of Laravel checks for an authenticated user of your software or project. In case the authentication is verified as valid, the middleware feature will let the user proceed with your project.

18. What is Named Routes?

Named routes are an important feature in the Laravel framework. It allows you to refer to the routes when generating URLs or redirects to the specific routes.

19. What are Queues?

Laravel queues provide a unified API across a variety of different queue backends, such as Beanstalk, Amazon SQS, Redis, or even a relational database.

20. What is a Singleton design pattern?

The Singleton Pattern in Laravel. The singleton pattern is when a class has a single instance of itself. we can say that whenever we want to use an instance of the class, we are using the same instance.

21. What are the query scopes?

Query Scopes Models allow you to query for data in your tables, as well as insert new records. You may use any of these methods in your Eloquent queries.

22. What is Closure in Laravel?

A Closure is an anonymous function. Closures are often used as callback methods and can be used as a parameter in a function.

23. Explain the structure of the Migration Class

Migration Structure A migration class contains two methods: up and down. The up method is used to add new tables, columns, or indexes to your database, while the down method should reverse the operations performed by the up method.

24. Why are migrations necessary?

Migrations are typically paired with Laravel's schema builder to build you. the current state of the column and create the SQL queries needed to make the required.

25. What is Autoloader in PHP?

An autoloader is a function that takes a class name as an argument and then includes the file that contains the corresponding class, For example: function autoloader ( $class ) { $path = $DOCUMENT_ROOT. '/ classes/'; require $path. $ class.'. php'; }

26. What is Laravel Homestead?

Laravel Homestead is an official, pre-packaged Vagrant "box" that provides you a wonderful development environment without requiring you to install PHP, HHVM, a web server, and any other server software on your local machine.

27. Which template engine Laravel use?

Laravel uses Blade template Engine.

28. What do you understand by Unit testing?

Unit testing is built-in testing provided as an integral part of Laravel. It consists of unit tests that detect and prevent regressions in the framework. Unit tests can be run through the available artisan command-line utility.

29. What are the validations in Laravel?

Validations are approaches that Laravel uses to validate the incoming data within the application.Laravel consists of several different ways to validate the incoming data of the application. By default, the base controller class of Laravel uses a ValidatesRequests trait to validate all the incoming HTTP requests with the help of powerful validation rules.

30. What is the use of the Eloquent cursor() method in Laravel?

The cursor method allows us to iterate through our database using a cursor, which will only execute a single query. While processing large amounts of data, the cursor method may be used to reduce your memory usage greatly.

31. In which directory controllers are kept in Laravel?

Controllers are kept in app/http/Controllers directory.

32. How can we create a record in Laravel using eloquent?

To create a record in Laravel using eloquent. assume there columns like Id, name, password mobile and other timestamps. The above is the simple controller with a method saves the user to create a user record. We are creating an object instance from the User class by instantiating it. Once assigned we are executing the query using save() method of an Eloquent object.

33. What is autoloading classes in PHP?

The spl_autoload_register() function registers any number of autoloaders, enabling for classes and interfaces to be automatically loaded if they are currently not defined. By registering autoloaders, PHP is given a last chance to load the class or interface before it fails with an error.

34. What PSR 0?

PSR-0 looks at the namespace of a class and discerns its location on the hard drive from that bit of information. For example, the class \Zend\Mail\Message would lead to /path/to/project/lib/vendor/Zend/Mail/Message. php.

35. What is Laravel Vapor?

It is a serverless deployment platform that is powered by AWS. Laravel Vapor provides on-demand auto-scaling with zero server maintenance.

36. How can you display HTML with Blade in Laravel?

To display Html in laravel you can use below syntax.{!! $your_var!!}

37. How to install Laravel via composer?

To install Laravel with the composer run below command on your terminal.composer create-project Laravel/Laravel your-project-name version

38. What Is System Requirement For Installation Of Laravel 5.2 (latest Version)?

PHP>= 5.5.9

OpenSSL PHP ExtensionPDO PHP ExtensionMbstring PHP ExtensionTokenizer PHP Extension

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