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25 interview questions on Symfony 6for developers (2026)

Test your technical skills before an interview of Symfony 6 with 25 corrected questions. Beginner, Intermediate or Expert level.

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25 questions
Easy
9 votes2037 runs
1 comment

What does the 'auto' password hasher do in Symfony?

Back-end developer
hashing
password
smaine milianniat Feb 16, 2022
Hard
8 votes1490 runs
2 comments

How to use a constant in Twig?

Back-end developer
twig
constants
Sam V.at Apr 27, 2023
Easy
8 votes961 runs0 comment

What do the `persist` and `flush` methods of the Doctrine `EntityManager` do when called successively on a new entity?

Back-end developer
Jérômeat Feb 29, 2024
Medium
7 votes2126 runs2 comments

Events listeners are easier to reuse because the knowledge of the events is kept in the class rather than in the service definition.

Back-end developer
symfony
events
smaine milianniat Feb 16, 2022
Medium
6 votes1859 runs
2 comments

List the directories to which you must give write permissions on your web server.

Back-end developer
directories
permissions
Vincent Cotroat May 16, 2022
Medium
5 votes2094 runs
2 comments

List the security providers that don't exist in Symfony

Back-end developer
symfony
security
smaine milianniat Feb 16, 2022
Medium
5 votes1976 runs1 comment

How to make a Symfony voter faster

Back-end developer
symfony
voter
cache
smaine milianniat Feb 16, 2022
Medium
5 votes1966 runs
2 comments

The class Foo exists is registered as a service only in the "dev" and "test" environment

Back-end developer
symfony
environment
smaine milianniat Feb 16, 2022
Easy
5 votes1437 runs
3 comments

Extending the class `Symfony\Bundle\FrameworkBundle\Controller\AbstractController;` allows my controller to be declared as a service

Back-end developer
symfony
controller
smaine milianniat Feb 16, 2022
Easy
4 votes1993 runs1 comment

Which method does not exist in the class`Symfony\Component\HttpKernel\Event\KernelEvent;`?

Back-end developer
symfony
event
smaine milianniat Feb 16, 2022
Easy
4 votes1927 runs
1 comment

Enable a bundle by environment in Symfony

Back-end developer
bundles
environment
smaine milianniat Feb 16, 2022
Hard
4 votes1459 runs
3 comments

How to use URLs in a functional test in Symfony

Back-end developer
symfony
functional test
Thomas Cochardat Sep 5, 2023
Hard
3 votes2025 runs2 comments

Which methods do not exist in the following class?

Back-end developer
symfony
controller
smaine milianniat Jul 19, 2024
Easy
3 votes1293 runs
1 comment

How to make a HTTP request in Symfony

Back-end developer
HTTP request
Symfony
Anonymous authorat Oct 24, 2023
Hard
2 votes1942 runs
2 comments

Which kernel event does not exist in Symfony?

Back-end developer
symfony
kernel
smaine milianniat Feb 16, 2022
Medium
2 votes1814 runs
1 comment

Lint the container to check that the arguments injected into services match their type declarations.

Back-end developer
symfony
container
smaine milianniat Feb 16, 2022
Medium
2 votes625 runs
1 comment

Check if an article has errors in Symfony

Back-end developer
symfony
validation
Mounirat Nov 8, 2024
Medium
1 vote332 runs0 comment

What is the role of the Symfony\Contracts\Service\Attribute\Required attribute in Symfony?

Back-end developer
attributes
services
Tanguyat Apr 17, 2025
Medium
0 vote1722 runs
2 comments

Find the intruder in the following code.

Back-end developer
symfony
console
smaine milianniat Feb 16, 2022
Medium
0 vote1098 runs
2 comments

Send a notification using Symfony Notifier

Back-end developer
symfony
notifier
recipient
Julien HUMBERTat Nov 7, 2023