Slim Interview Questions and Answers

Slim Interview Questions

Slim Interview Questions and Answers

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Author

Umesh Singh

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20

Last updated

Mar 17, 2022
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Most Frequently Asked Slim Interview Questions

Here in this article, we will be listing frequently asked Slim Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q1. What is Slim framework and why it is used?
Answer

A PHP micro-framework, Slim helps the developers write easy yet powerful APIs and web applications. This framework provides a fast and robust router that can map route callbacks to various HTTP requests and URIs.It supports PSR-7 HTTP message implementation which allows the developers to assess and manipulate HTTP message method, status, headers, URI, body, and cookies.

Uses of Slim Framework
  • A quick way to write powerful APIs and web applications
  • Allows you to map functions with URLs and methods
  • Allow you to modify requests and responses.
  • Developers have control over dependencies using Dependency Injection
Q2. Is Slim framework similar to Silex and how do they differ?
Answer

Slim and Silex are different because Slim is a micro framework, while Silex is a full-stack framework.

Slim and Silex are similar because they both help developers build web applications with simple tools for receiving a request and delivering a response.

Q3. How to Slim framework different from other frameworks like Zend, Laravel, Symfony? Explain
Answer
S.no Laravel, Symfony, and Zend Slim
1. Full-stack frameworks Micro framework
2. Consist of individual components that do different tasks necessary for complex web apps. A single component library that addresses the core of web apps.
3. Come with overhead Minimal overhead
Q4. What is the latest version of Slim Framework?
Answer

Slim 3.12.0 released on 15 Jan 2019

Q5. How to install Slim Framework with composer?
Answer

composer require slim/slim "^3.0"

Q6. What are the features of Slim Framework?
Answer

This information has been asked quite a few times recently in Slim framework interview questions.

Features of Slim Framework
  • Includes great routes - Route middleware, Route redirect, and Standard HTTP methods.
  • Easy to solve and fix the errors
  • AES-256 encryption secures the data and stores in cookies
  • Possible to render external PHP files using template rendering
Q7. What are the System Requirements to install Slim Framework?
Answer
  • Web server with URL rewriting
  • PHP 5.5 or newer
Q8. What are the steps to upgrade from version 2 to version 3 in Slim Framework?
Answer
Q9. What is Hook in Slim Framework and how it is used?
Answer

In the Slim Framework, a hook is used to register a callback. Identified by string names, a hook is an instance at which the callables will get invoked as per the priority list assigned. It is possible to attach multiple callables to a single hook by using the hook() method.

Q10. What do you mean by middleware in Slim Framework?
Answer

A middleware is a kind of callable that accepts three types of arguments- PSR7 request object, a PSR7 response object, and next middleware. A middleware can do all types of functions with objects. However, a middleware MUST initiate next middleware and clear Response and Request objects as arguments.

If you are preparing for Slim interview, you can read our slim framework tutorial for in-depth knowledge.

Q11. What is Dependency Injection in Slim Framework?
Answer

In Slim Framework, dependency injection is a container for preparing, managing, and injecting application dependencies.

Q12. How to set and get a cookie in Slim Framework?
Answer

Setting a cookie in Slim Framework will require a key, value, and specific time to allow the cookie to be present.

// With all parameters



$app->setCookie(

   $name,

   $value,

   $expiresAt,

   $path,

   $domain,

   $secure,

   $httponly

);





// To set Cookie

$app->setCookie('bestinterviewquestion', 'bar', '2 days');



// To get Cookie

$app = new \Slim\Slim();

$foo = $app->getCookie('bestinterviewquestion');
Q13. How to define a middleware in Slim Framework?
Answer
Q14. What is Route callbacks and explain its arguments?
Answer

Each routing method in Slim Framework will accept a callback routine as the final argument. The last case may be any PHP callable.

By default, the framework allows three arguments - Request, Response, arguments.

An argument is a function that specifies the actions to be taken when a route is matched to a request. It includes values for the existing route’s specific placeholders.

Q15. How to create routes in Slim Framework?
Answer
Q16. What Request Method is available in Slim Framework? Explain
Answer

Every HTTP request in the Slim Framework has a request method assigned. Here are some of the request methods:

  • GET
  • POST
  • PUT
  • DELETE
  • HEAD
  • PATCH
  • OPTIONS
Q17. How to get IP address of client machine in Slim Framework?
Answer

Our most extensive Slim framework interview questions and answers can help developers crack any job interview.

$request->getAttribute('ip_address').
OR
$requestIP = $request->getServerParam('REMOTE_ADDR');

Q18. What is CORS and how it is enabled in Slim Framework?
Answer

CORS or Cross-Origin Resource Sharing is a middleware that implements resource sharing across the origin. In Slim application, CORS is implemented through Access-Control-Allow-Origin header. The best way to enable CORS is by using the cors-middleware package.

Q19. How to upload files in Slim Framework?
Answer
Q20. How to use "404 Not Found" in Slim Framework?
Answer