654 interview questions for Software integrator (2026)

Medium

118 votes4503 runs

6 comments

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

Web developer

Vincent Cotroat Jan 18, 2024

Easy

52 votes3598 runs0 comment

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

Back-end developer

sql

select

where

Vincent Cotroat Mar 30, 2023

Medium

49 votes4134 runs4 comments

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

Web developer

promises

async

Vincent Cotroat Mar 28, 2023

Easy

42 votes2188 runs1 comment

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

Back-end developer

recursion

Vincent Cotroat Mar 28, 2023

Easy

39 votes2238 runs1 comment

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

Back-end developer

functions

errors

Vincent Cotroat Mar 24, 2023

Easy

36 votes3208 runs

12 comments

Write a Java program that prints 'welovedev'.

Full stack developer

strings

variables

Pierreat Sep 19, 2022

Easy

32 votes4226 runs

2 comments

Fix the following Javascript loop:

Web developer

loops

conditions

Anonymous authorat Apr 27, 2023

Hard

26 votes2560 runs

1 comment

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

Back-end developer

list

for loop

Anonymous authorat Mar 28, 2022

Easy

24 votes912 runs1 comment

What is the purpose of the Laravel Sanctum tool?

Web developer

laravel

authentication

Damienat Sep 6, 2023

Easy

20 votes3563 runs0 comment

Write a SQL query to insert data into a table

Back-end developer

sql

insert

Vincent Cotroat Mar 27, 2023

Easy

20 votes3547 runs0 comment

Select only distinct values in a column using SQL

Back-end developer

sql

distinct

Vincent Cotroat Mar 27, 2023

Easy

19 votes3457 runs1 comment

Update a column in an SQL table

Back-end developer

sql

update

Vincent Cotroat Nov 7, 2023

Hard

17 votes3589 runs

1 comment

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; } ```

Back-end developer

loops

control flow

Thomas De verdièreat Dec 16, 2021

Medium

17 votes2962 runs2 comments

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

Back-end developer

spring

scope

Anonymous authorat Dec 21, 2021

Medium

17 votes2918 runs0 comment

Explain the prototype scope in Spring

Back-end developer

spring

bean

Anonymous authorat Dec 21, 2021

Easy

16 votes3524 runs0 comment

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

Back-end developer

sql

order by

Vincent Cotroat Mar 27, 2023

Easy

15 votes3104 runs

2 comments

How should a package be named in Java?

Full stack developer

packages

java

Pierreat Sep 19, 2022

Medium

15 votes1848 runs

1 comment

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

Full stack developer

EL Mostafa Fadiliat Feb 13, 2024

Medium

15 votes945 runs0 comment

What is the best practice to apply in your code to improve the performance of your application?

Back-end developer

performance

gzip

Vincent Cotroat Nov 15, 2023

Hard

14 votes3604 runs1 comment

Serialization can be customized with the Externalizable interface

Back-end developer

serialization

interface

Thomas De verdièreat Jan 4, 2022

654 interview questionsfor Software integrator (2026)

Test your technical skills before an interview of Software integrator with 654 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:

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

What is the purpose of the Laravel Sanctum tool?

Write a SQL query to insert data into a table

Select only distinct values in a column using SQL

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; } ```

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

Explain the prototype scope in Spring

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

How should a package be named in Java?

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

What is the best practice to apply in your code to improve the performance of your application?

Serialization can be customized with the Externalizable interface