1645 interview questions for Back-end developer (2025)

99 votes3881 runs5 comments

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Pierreat Sep 19, 2022

28 votes3670 runs

Camilleat Apr 27, 2023

23 votes728 runs1 comment

authentication

Damienat Sep 6, 2023

21 votes2237 runs0 comment

Théoat Mar 28, 2022

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control flow

Thomas De verdièreat Dec 16, 2021

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Anonymous authorat Dec 21, 2021

15 votes2773 runs2 comments

Anonymous authorat Dec 21, 2021

14 votes3674 runs1 comment

Smaïne Millaniat Dec 3, 2021

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conditionals

Adrienat Mar 30, 2022

13 votes2768 runs

Pierreat Sep 19, 2022

13 votes1468 runs

1645 interview questionsfor Back-end developer (2025)

Test your technical skills before an interview of Back-end developer with 1645 corrected questions. Beginner, Intermediate or Expert level.

1645 interview questionsfor Back-end developer (2025)

Test your technical skills before an interview of Back-end developer with 1645 corrected questions. Beginner, Intermediate or Expert level.

Understanding the differences between `map()` and `forEach()` methods in JavaScript

Write a SQL query to retrieve the list of employees with a salary greater than 5100.

Write a JavaScript function that fetches data from an API and logs it to the console.

Write a Python function that returns the factorial of a number.

Explain the difference between the `include` and `require` functions in PHP.

Write a Java program that prints 'welovedev'.

Fix the following Javascript loop:

What is the purpose of the Laravel Sanctum tool?

Write a Python function that prints the elements of a list.

Select only distinct values in a column using SQL

Update a column in an SQL table

Write a SQL query to insert data into a table

How many times is the condition `(a++ < 15)` evaluated in the following code? ```java int a = 3; while (a++ < 15) { if ((a++ % 5) == 0) break; } ```

Which SQL keyword is used to sort the result of a SELECT statement?

Explain the prototype scope in Spring

A bean with a `session` scope is injected into a bean with a` singleton` scope. What happens when the application starts?

What is the minimum PHP version for Symfony 5?

Write a Javascript code that displays 'Adversity is not to be feared' and 'There is potentially a real danger'

How should a package be named in Java?

What is the difference between an interface and an abstract class in Java?