1645 interview questions for Back-end developer (2025)

99 votes3883 runs5 comments

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Pierreat Sep 19, 2022

28 votes3671 runs

Camilleat Apr 27, 2023

23 votes729 runs1 comment

authentication

Damienat Sep 6, 2023

21 votes2240 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 votes3675 runs1 comment

Smaïne Millaniat Dec 3, 2021

13 votes3879 runs

conditionals

Adrienat Mar 30, 2022

13 votes2773 runs

Pierreat Sep 19, 2022

13 votes1472 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?