1644 interview questions for Back-end developer (2025)

98 votes3864 runs5 comments

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Pierreat Sep 19, 2022

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Camilleat Apr 27, 2023

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authentication

Damienat Sep 6, 2023

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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 votes2767 runs2 comments

Anonymous authorat Dec 21, 2021

14 votes3672 runs1 comment

Smaïne Millaniat Dec 3, 2021

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Pierreat Sep 19, 2022

13 votes1516 runs1 comment

13 votes1462 runs

1644 interview questionsfor Back-end developer (2025)

Test your technical skills before an interview of Back-end developer with 1644 corrected questions. Beginner, Intermediate or Expert level.

1644 interview questionsfor Back-end developer (2025)

Test your technical skills before an interview of Back-end developer with 1644 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

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?

Write a SQL query to retrieve the titles of books written by 'John Smith'.

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