1645 interview questions for Back-end developer (2025)

98 votes3868 runs5 comments

45 votes3109 runs0 comment

43 votes3544 runs4 comments

35 votes1851 runs1 comment

33 votes1959 runs1 comment

28 votes3658 runs

Camilleat Apr 27, 2023

28 votes2848 runs

Pierreat Sep 19, 2022

22 votes719 runs1 comment

authentication

Damienat Sep 6, 2023

21 votes2231 runs0 comment

Théoat Mar 28, 2022

19 votes3063 runs0 comment

17 votes3082 runs0 comment

17 votes2983 runs1 comment

16 votes3347 runs

control flow

Thomas De verdièreat Dec 16, 2021

16 votes3047 runs0 comment

16 votes2705 runs0 comment

Anonymous authorat Dec 21, 2021

15 votes2768 runs2 comments

Anonymous authorat Dec 21, 2021

14 votes3672 runs1 comment

Smaïne Millaniat Dec 3, 2021

13 votes2762 runs

Pierreat Sep 19, 2022

13 votes1462 runs

13 votes1263 runs0 comment

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.

Fix the following Javascript loop:

Write a Java program that prints 'welovedev'.

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

Write a SQL query to insert data into a table

Update a column in an SQL 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?

How should a package be named in Java?

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

Which of the following utility types makes all properties of a given type optional?