To help freshers and experienced candidates get their dream jobs, we have compiled a list of Laravel interview questions and answers.
You will learn how to answer basic to advanced Laravel interview questions in this article. All these questions explained in details on Scratch Coding Laravel Examples
Laravel Interview Questions:
1) What is Laravel?
The Laravel framework for PHP web applications is an open-source project. There are very good documentation, expressiveness, and ease of learning about this framework. Since Laravel can be used by beginners and advanced users alike, it is a very developer-friendly framework. Your skills as a developer will allow you to dig deeper into Laravel’s functionalities and provide more robust enterprise solutions.
Additionally, the framework is highly scalable since you can use packages such as Vapor to handle hundreds of thousands of requests.
2) What is the latest Laravel version?
Latest version of Laravel is 9.x by the time we are writing these interview questions. You can find latest version by clicking here
3) Define composer.
Composer is a PHP application-level package manager. Using it, you can manage dependencies and libraries for PHP software.
4) What is HTTP middleware?
The purpose of HTTP middleware is to filter HTTP requests. As part of the Laravel framework, there is middleware that checks whether the user of the application is authenticated or not.
For our purposes, we can always create new middleware. We can create a new middleware using the following artisan command:
php artisan make:middleware MiddleWareName
By running the above command, a new middleware file will be created in the app/Http/Middleware folder.
5) Name aggregates methods of query builder.
The query builder has five aggregate methods:
6) What is a Route?
The route specifies an endpoint based on a URI (Uniform Resource Identifier). In Laravel applications, it serves as a pointer.
In most cases, a route points to a controller method and dictates which HTTP methods can access it.
7) Why use Route?
In the project’s root directory, routes are stored in files under the /routes folder. Each side of the application has its own set of files (sides is a term used in the hexagonal architecture methodology).
8) What do we mean by bundles?
A bundle is referred to as a package in Laravel. Laravel can be enhanced with these packages. There can be views, configurations, migrations, routes, and tasks in a package.
9) Explain important directories used in a common Laravel application.
A common Laravel application uses the following directories:
- App/: This folder contains our application code. Within this folder, you will find controller files, policies, and models.
- config/: Holds the configuration files for the app. As a result, they are rarely modified directly, but instead rely on values set up in the .env (environment) file located at the root of the application.
- Database/: Stores database files, including migrations, seeds, and test factories.
- Public/: A publicly accessible folder where assets and index.php are stored.
10) What is a Controller?
The Controller is the “C” in Laravel’s MVC (Model-View-Controller) architecture.
11) Explain reverse routing in Laravel.
A reverse routing method generates URLs based on symbols or names. You can make your Laravel application more flexible with it.
12) Explain traits in Laravel.
Traits are a group of functions you can include within another class in Laravel. The concept of a trait is similar to that of an abstract class. However, you can use its methods in a class, rather than instantiate it directly.
13) Explain the concept of contracts in Laravel.
These are the interfaces to the Laravel framework. Contracts like these provide core services. Laravel contracts include the framework implementation corresponding to them.
14) How will you register service providers?
In config/app.php, you can register service providers in an array that contains the class name of the service provider.
15) Where will you define Laravel’s Facades?
Facades of Laravel are defined in Illuminate\Support\Facades namespace.
16) State the difference between get and post method.
With the Get method, you can send a limited amount of data in the header. Sending large amounts of data is possible with Post.
17) List default packages of Laravel 5.6.
The default packages of Laravel 5.6 are:
18) What is a service container in Laravel?
In Laravel, a service container is used to perform dependency injection.
19) How can you enable query log in Laravel?
To enable query log in Laravel, use the enableQueryLog method.
20) Explain the concept of events in Laravel.
Laravel events are occurrences or actions that allow you to subscribe and listen to events. In some cases, Laravel fires events automatically when any activity occurs.
21) Explain dependency injection and their types.
A technique in which one object is dependent on another. The three types of dependency injection are
- constructor injection,
- setter injection,
- interface injection.
22) What are the advantages of using Laravel?
Laravel offers the following benefits:
- In Laravel, blade templates are used to create dynamic layouts and increase compiling times.
- Code can be reused without any hassle.
- By using an advanced query builder mechanism, you can enforce constraints between multiple DBM objects.
- With the framework, you do not have to manually maintain and include paths because it is auto-loaded
- Using LOC containers, you can make your own tools.
- The Laravel version control system simplifies migration management.
23) Explain validation concept in Laravel.
When designing a Laravel application, validation is an important concept. Prior to storing data into the database, it ensures that it is always in the expected format. You can validate your data in many ways with Laravel.
ValidatesRequests is a class used by the base controller trait for validating requests from the client.
24) What is ORM?
An ORM stands for an Object Relational Mapping
25) What is the best way to reduce memory usage in Laravel?
You can reduce memory usage by using the cursor method when processing large amounts of data.
26) List the different types of relationships available in Laravel Eloquent.
There are five types of relationships in Laravel Eloquent: 1) One To One 2) One To Many 3) Many To Many 4) Has Many Through 5) Polymorphic Relations.
27) Name the Laravel Template Engine.
Laravel uses Blade as its template engine.
28) Name databases supported by Laravel.
The following databases are supported by Laravel:
- SQL Server
29) What is the importance of migrations?
The purpose of migrations is to ensure database consistency so that you can share applications. It is difficult to share any Laravel application without migration. Additionally, it allows you to sync your database.
30) What is a lumen?
Lumen is a micro-framework. It is a smaller, faster version of building Laravel-based services and REST APIs.
(31 ) What is PHP artisan?
Artisans are command-line tools in Laravel. This application provides commands to help you easily build Laravel applications.
32) What is the process of generating URLs?
Laravel has helpers for generating URLs. You can use this when you’re building links in your API response and templates.
33) What class is used to handle exceptions?
The App/Exceptions/Handler class handles Laravel exceptions.
34) What are the most common HTTP error codes?
HTTP error codes include:
- The 404 error message appears when a page cannot be found.
- A 401 error indicates that the error has not been authorized
35) Describe Laravel’s fluent query builder.
A database query builder provides a convenient, faster interface for creating and running queries.
36) What is the purpose of the dd() function?
This function dumps the contents of a variable to the browser. Dd stands for Dump and Die.
37) List out the common Laravel artisan commands.
Laravel supports the following artisan commands:
- PHP artisan down;
- PHP artisan up;
- PHP artisan make:controller;
- PHP artisan make:model;
- PHP artisan make:migration;
- PHP artisan make:middleware;
38) What is the best way to configure a mail-in Laravel?
There are APIs provided by Laravel that allow you to send emails on a local server and on a live server.
39) Explain Auth.
It is a method of identifying user login credential with a password. Using Laravel, it can be managed with a session which takes two parameters: a username and a password.
40) Define delete() and softDeletes().
- The delete() function removes all records from the database table.
- The softDeletes() method does not remove the data from the table. It is used to flag any record as deleted.
41) In Laravel, how can you create a real-time sitemap.xml file?
It is possible to create all the web pages of a website in order to inform a search engine about how the content is organized. Crawlers of search engines use this file intelligently to crawl websites.
42) Explain the faker in Laravel.
It is a type of module or package that is used to create fake data. Data such as this can be used for testing purposes.
In addition, it can generate:
- Lorem texts.
43) How will you check if a table exists in the database or not?
For checking whether a table exists in a database, use hasTable() Laravel function.
44) How do insert() and insertGetId() differ in Laravel?
- Insert() simply inserts a record into the database. IDs do not have to be auto-incremented.
- This function also inserts a record into a table, but with an auto-incrementing ID field.
45) Explain the concept of active records in Laravel.
In Active Record, your class is directly linked to the database table. You can use it to perform CRUD operations.
46) List the basic concepts in Laravel?
Following are basic concepts used in Laravel:
- Eloquent ORM
- Blade Templates
47) Define Implicit Controller.
With implicit controllers, you can define a proper route to handle controller actions. You can specify them in Route:: controller() method of route.php.
48) How to use a custom table in Laravel Model?
By overriding $table’s property, you can use a custom table.
49) What is the MVC framework?
There are three parts to it: Model, View, and Controller:
- Laravel application models define logic.
- Laravel application UI logic is covered in this view.
- Controllers serve as interfaces between Models and Views. It is a method of interacting with an application by the user.
50) Define @include.
Using @include, you can load more than one template view file. It allows you to include a view within another view. Multiple files can also be loaded in one view.
51) Describe the concept of cookies.
The browser, while browsing a particular website, stores a small file called a cookie on the user’s PC.
52) Which file is used to create a connection with the database?
The .env file can be used to create a connection with the database.
53) What does Eloquent mean?
Eloquent is an ORM used in Laravel. It provides simple active record implementations that work with the database. Database tables have models, which allow them to be interacted with.
54) Name some Inbuilt Authentication Controllers of Laravel.
There are several authentication controllers built into the Laravel installation. The controllers are as follows:
55) Define the Laravel guard.
A Laravel guard component is used to identify authenticated users. Incoming requests are initially routed through this guard to validate user credentials.
57) Does Laravel have a rate limit for its API?
This is a feature of Laravel. It provides handle throttling. A rate limiter helps Laravel developers create secure applications and prevent DOS attacks.
57) Explain how collections work in Laravel.
A collection is a wrapper class for arrays. Laravel Eloquent queries use a set of the most common functions to return database results.
58) What is the purpose of DB facade?
The DB facade is used to run SQL queries such as create, select, update, insert, and delete.
59) What is the purpose of Object Relational Mapping?
Object Relational Mapping is a technique that helps developers to address, access, and manipulate objects without considering the relation between object and their data sources.
60) Explain the concept of routing in Laravel.
It allows routing all your application requests to the controller. Laravel routing acknowledges and accepts a Uniform Resource Identifier with a closure.
61) What is Ajax in Laravel?
62) What is a session in Laravel?
The session is used to transfer user information from one web page to another. In order to handle session data, Laravel provides drivers such as cookies, arrays, files, Memcached, and Redis.
63) How to access session data?
A session instance can be used to access session data via HTTP requests. You can get the session details by using the get() method with a “Key” parameter.
64) Explain the difference between authentication and authorization.
Authentication involves confirming user identities through credentials, while authorization involves gaining access to the system.
65) Explain to listeners.
The purpose of listeners is to handle events and exceptions. LoginListener is the most common listener in Laravel for login events.
66) What are policies classes?
The policies classes contain the authorization logic of the Laravel application. These classes are used for a particular model or resource.
67) How do I roll back the last migration?
To roll back the last migration, you will need to use the artisan command.
68) What is Laravel Dusk?
69) Explain Laravel echo.
70) How does the make method work?
Laravel developers can use the make method to bind an interface to concreate class. This method returns an instance of the class or interface. In the constructor of a class, Laravel automatically injects dependencies.
71) Explain Response in Laravel.
The web browser should receive a response from all controllers and routes. There are several ways to return this response in Laravel. The most basic response is returning a string from a controller or route.
72) What is query scope?
It’s a feature of Laravel that allows us to reuse similar queries. Laravel does not require us to write the same types of queries again. You can then query the model using the scope method once it has been defined.
73) Explain homestead in Laravel.
The Laravel homestead is a pre-packaged vagrant box that provides a powerful development environment without the need to install HHVM, a web server, or PHP.
74) What is a Laravel namespace?
Using a namespace, you can group functions, classes, and constants together.
75) What is Laravel Forge?
The Laravel Forge helps organize and design web applications. Although the manufacturers of the Laravel framework developed this toll, it can automate the deployment of every web application that works on a PHP server.
76) State the difference between CodeIgniter and Laravel.
|Support of ORM||CodeIgniter does not support Object-relational mapping.||Laravel supports ORM.|
|Provide Authentication||It does provide user authentication.||It has inbuilt user authentication.|
|Programming Paradigm||It is component-oriented.||It is object-oriented.|
|Support of other Database Management System||It supports Microsoft SQL Server, ORACLE, MYSQL, IBM DB2, PostgreSQL, JDBC, and orientDB compatible.||It supports PostgreSQL, MySQL, MongoDB, and Microsoft BI, but CodeIgniter additionally supports other databases like Microsoft SQL Server, DB2, Oracle, etc.|
|HTTPS Support||CodeIgniter partially support HTTPS. Therefore, programmers can use the URL to secure the data transmission process by creating PATS.||Laravel supports custom HTTPS routes. The programmers can create a specific URL for HTTPS route they have defined.|
77) What is an Observer?
Laravel has a feature called Model Observers. For a model, it is used to create clusters of event listeners. Method names of these classes depict the Eloquent event. The model is passed as an argument to observers class methods.
78) What is the use of the bootstrap directory?
Initiates a Laravel project. The bootstrap directory contains the app.php file that bootstraps the framework.
79) What is the default session timeout duration?
2 hours is the default Laravel session timeout.
80) What is the process for removing compiled class files?
To remove compiled class files, use the clear-compiled command.
81) Where is robot.txt located?
Public directory contains Robot.txt file.
82) Explain API.PHP route.
Its routes correspond to an API cluster. It has API middleware which is enabled by default in Laravel. These routes do not have any state and cross-request memory or have no sessions.
83) What is a named route?
Name route is a method for generating routing paths. You can select the chaining of these routes by applying the name method to their descriptions.
84) What is open source software?
Open-source software is a program whose source code is freely available. Users can share and modify the source code according to their needs.
85) Explain Logging in Laravel.
This technique generates errors in the system logs. Logging in helps increase the system’s reliability. Various logging modes are supported by Laravel, such as syslog, daily, single, and error logs.
86) What is localization?
This is a feature of Laravel that allows various languages to be used in the application. In the resources/views folder, developers can store strings of different languages. Each language should have its own folder.
87) Define hashing in Laravel.
In this method, text is converted into a key that displays the original text. By using the Hash facade, Laravel secures the password by hashing it.
88) Explain the concept of encryption and decryption in Laravel.
Using algorithms, any message can be transformed so that a third party cannot read it. In order to keep your sensitive information safe from intruders, encryption is quite useful.
Cryptography is used to encrypt data. Plain messages are messages that are not encrypted. Crypt messages are messages obtained after encryption. The process of converting cipher text into plain text is known as decryption.
89) How to share data with views?
Laravel uses a method called share() to pass data to all views. The method takes two arguments, key and value.
The share() method is generally called from the boot method of the Laravel application service provider. It is possible to use any service provider, AppServiceProvider, or our own service provider.
90) Explain the web.php route.
Web.php is the public-facing route that is accessed by a browser. Web browsers are sent to this route, which is the most common. As well as CSRF protection (which helps defend against form-based malicious attacks and hacks), they generally contain a degree of state (by using sessions).
91) How to generate a request in Laravel?
To generate a request in Laravel, use the following artisan command:
php artisan make:request UploadFileRequest