Top laravel Interview Questions and answers

Top laravel Interview Questions and answers

Laravel is the one of most secure,powerful and lightweight web application frameworks design by using popular technology PHP.It has some inbuilt features for fast development.We will cover all kinds of interview questions.

Most of the MNC company now hiring laravel personnel in huge number.Here you will get top laravel questions and answers prepared by laravel experts, which will helpful to crack face to face or technical interviews.

Q:Define framework of laravel?

It is basically used for development of web application followed by model-view-controller(mvc) architectured in php and also it is open source web framework,created by Taylor Otwell.

Q:Define routing in laravel and what are the steps to write it?

In laravel routes directory contains all the route files.Automatically all the route files are loaded by laravel framework.

For web interface routes/web.php files defines routes.The web middleware group provides features like session state and CSRF protection which is assigned by routes.

Q:Define Lumen in laravel?

Lumen is a micro web framework.It helps to build laravel based microservices and fast REST API’s.

Q:Laravel framework advantages?

1.It is a simple and fast process for setup web application.
2.Multiple file system is available in laravel framework.
3.Already present authentication system.
4.All the application logic are written in route.

Q:Define composer in laravel?

All the PHP applications are installed and manage by a dependency manager which is called composer.It also provide nice code reusability.

Q:How to installing laravel through composer?

Run the below command to install laravel through composer:
composer create-project Laravel/Laravel your-project-name version

Q:what is the use of php artisan and find out some artisan command?

It is a command line tool present in laravel.Artisan commands are helpful commands for make our application easily.These are some artisan command

  • 1.php artisan make
  • 2.php artisan thinker
  • 3.php artisan make controller_name
  • 4.php artisan -versian
  • 5.php artisan make model model_name
  • 6.php artisan list
  • 7.php artisan help
  • Q:How to check which version of laravel is currently installed?

    php artisan -version command line is used to check which version of laravel framework is currently installed.

    Q:What is the meaning of events in laravel?

    In laravel, event provides simple observer implementation and also it is an incident identified and handled by the program.Some example of events are user login/logout,a new user comment is posted,a new user has registered,new product is added.

    Q:In laravel what type of template engine to be used?

    Blade template engine is used in laravel.It is the most powerful and simple template engine and the extension of blade view is .blade.php which is placed in the resources/views directory.

    Q:In laravel how to change default database?

    MySql is the default database in laravel which is placed in config/database.php file.Here search for ‘default’ => ‘mysql’ and change it to eg:’default’ => ‘sqllite’.

    Q:What do you mean by Migration in laravel?How can we achieve?

    Basically,in your database Laravel Migration acts like version controller and allowing the user to edit and share the application’s database schema.
    1.For creating Migration,Make:Artisan command
    2.After Creating Migration File it is stored in /database/migrations directory
    3.Every migration file has a timestamp and it allows to know the order of the migrations.
    4.Depending upon the operating system,open the terminal or command prompt to view.

    Q:In Laravel which type of service providers are available?

    Ans:Service providers occupies the central place of all Laravel application bootstrapping.
    Through service provider all the laravel applications are bootstaped.In laravel service container such as middleware,routes all the service providers are need to be register.

    Q:What is the process of register a service provider?

    Steps for register a service provider:
    1. Open Config/app.php file
    2. Find Provides array having ServiceProvide.
    3. Add namesapce ” Iluminate\Xyz\XYZServiceProvider:: class” end of the array list.

    Q:In laravel define implicit controller?

    A single route is established to handle every action in the controller.you can establish it PHP [SyntaxHL]file.eg:Route:controller method.
    EXAMPLE: Route::controller(‘base URI’,”);[/SyntaxHL]

    Q:What is the role of “composer dump-autoload” in Laravel?

    When “composer dump-autoload” run,the composer re reads the composer.json file and buid the list of file to autoload.

    Q:How to define laravel service container?

    Service container is the most important and powerful tool in laravel.In laravel using this tool for performing dependency injection and resolving class dependencies.

    Q:In laravel how to find the ip address of user?

    In laravel to find the ip address of user,use the ip() method of request’s class.
    [SyntaxHL]Example:

    public function getUserIp(Request $request)
    {
    return $user_ip_address=$request->ip();
    }[/SyntaxHL]

    Q:Enabling query log in laravel?

    In laravel using enableQueryLog() method to enable query log.

    Q:How to define laravel facades?

    All the facades which are available in laravel provide access to the different features.
    It also provide static link interface to classes which are available in service container.
    All the facades are defined in namespace.

    Q: Uses of custom table in laravel model?

    In laravel create new model than overriding protected $table property of Eloquent.Here is the uses of custom table
    [SyntaxHL]class User extends Eloquent{
    protected $table=”my_demo_custom_table”;

    }[/SyntaxHL]

    Q:Uses of fillable attribute in laravel model?

    In laravel create new model than overriding protected $fillable property of Eloquent.Here is the uses of fillable attribute.
    [SyntaxHL]class User extends Eloquent{
    protected $fillable =array(‘id’,’f_name’,’l_name’,’age’);

    }[/SyntaxHL]

    Q:Why we use Eloquent cursor() method in Laravel ?

    The cursor method is using a cursor which allows you to iterate through the database records to execute a single query.
    while executing large amount of data,cursor() method is used to reduce the memory usage.

    Q:why we use dd() function in laravel?

    It is a supporting function and drop the browser’s variable content and pause the script execution.

    Q:In Laravel what is the use of clousers?

    An anonymous function that can be assigned to a variable which is called closures,closures can also access a variable outside the scope.

    Q:In laravel,what is stored in vendor directory?

    Vendor directory of laravel stored all the packages which is pulled out from composer.

    Q:Define laravel contacts?

    Ans:It is a set of interfaces which is provided by the laravel framework that defines the core services.

    Q:In laravel, what is the role of php compact function?

    Compact() method can take any key to find the variables with the same name and that variable will help to build the associative array

    Q:In laravel,in which directory controllers are located?

    The path of controllers are App/Http/controllres.

    Q:In laravel how to get logged in user info?

    In laravel user() function is used to get logged in user info.
    [SyntaxHL]Example:

    if(Auth::check()){
    $loggedIn_user=Auth::User();
    dd($loggedIn_user);

    }[/SyntaxHL]

    32.Q:Caching is supported in laravel or not?

    Yes,popular caching backends like Redis and Memcached are supported in laravel.To use the file caches driver,which keeps the serialized,
    cached objects in the file system,laravel is configured.It is always preferable to use caching backends like Redis and Memcached for large projects.

    Q:How to define ORM in laravel?

    ORM is called object relational mapping.It is a mapping tool for converting data between incompatible type system using object oriented programming language.

    Q:How to create new record in database using laravel eloquent?

    laravel eloquent is used to create a new record in database,here is the steps:
    1:To create a new model intance
    2:Set attributes on the model
    3:Call the save method.

    Example:

    public function saveProduct(Request $request )
    $product = new product;
    $product->name = $request->name;
    $product->description = $request->name;
    $product->save();

    Q:In laravel how to define traits?

    Ans:It is a collection of functions which are included in another class.In php traits can be reduce the limitations of single inheritance
    by enabling a developer to reuse a group of function in variety independent classes which is present in different class hierarchies.
    [SyntaxHL]Example:
    trait Sharable {

    public function share($item)
    {
    return ‘share this item’;
    }

    }
    In other classes this trait can be included like this:

    class Post {

    use Sharable;

    }

    class Comment {

    use Sharable;

    }
    Now out of these classes if you were to create new objects you would find that they both have the share() method available:
    $post = new Post;
    echo $post->share(”); // ‘share this item’

    $comment = new Comment;
    echo $comment->share(”); // ‘share this item'[/SyntaxHL]

    Q:Using artisan how to create migration?

    Here is the commands to make migration through artisan
    php artisan make:migration create_users_table

    Q: How to explain validations process in laravel?

    In laravel controller class uses a ValidatesRequests trait that provides a proper function to validate all http requests which are comming from client side. By creating Form Reuest we can also validate data.

    Q:What is the meaning of laravel eloquent?

    1:It is the most important part of php ORM.
    2:It provides a very beautiful and simple Active Record.
    3:All the table present in the database containing a coresponding MODEL.
    4:This MODEL is interact with the table which is present in the database and performing some database related operation on the table.
    Example of model clas:
    namespace App;

    use Illuminate\Database\Eloquent\Model;

    class Users extends Model
    {

    }

    Q:Is laravel application secured?

    Yes,laravel applications are 100% secured.Some inbuilt security features are available in laravel:
    1:CSRF security
    2:input validations
    3:encrypted session/cookies ans also high encryption level for securing Passwords.

    Q:What is the meaning of Active Record Implementation in laravel?

    Ans:It is an architectural pattern which is present in memory object data.
    Using elorent ORM, laravel implements Active Records.
    Example:
    $product = new Product;
    $product->title = ‘OPPO f3’;
    $product->save();

    Q:what are the types of relationships supported by Laravel?

    There are 7 types of relationships supported by laravel.These are given below:
    1:Many To Many
    2:Polymorphic Relations
    3:Many To Many Polymorphic Relations
    4:One To One
    5:One To Many
    6:One To Many(Inverse)
    7:Has Many Through

    Q:What is the use of laravel Query Builder?

    It provides easy,suitable interface to creating database queries.
    Using PDO restriction it can prevent our aplication from attack of SQL injection.

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