Coding tests

DevSkiller’s coding test catalog contains real-life work sample coding and programming tests. Our coding tests are powered by the RealLifeTesting™ methodology which helps you to single out qualified developers with the required skill set.

Browse our range of coding tests that cover over 220+ languages, resources, and skills. Finding your next developer has never been easier with DevSkiller coding tests and interview questions.

Java
MIDDLE
Tested skills
Duration
57 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Java, Spring Boot

Code gaps

assessing knowledge of PostgreSQL, SQL

Programming task - Level: Medium

Java | Spring Boot | Items Retriever Microservice - Implement a microservice to retrieve items from the shopping system.

.NET
JUNIOR
Tested skills
Duration
71 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Logical thinking

Code gaps

assessing knowledge of .NET Core, .NET Internals, dotnet build, dotnet test, dotnet restore

Programming task - Level: Easy

.NET | .NET Core , Microservices | Traffic volume registration API - Finish the implementation of two microservices which collect data from sensors. Required functionality has to be implemented in the proper service and other services (subscribers) must be informed about new data.

Android
SENIOR
Tested skills
Duration
58 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Android

Code gaps

assessing knowledge of Android, Kotlin

Programming task - Level: Hard

Android | Kotlin, C | JNI Magic - Implement the JNI functionality that enables you to call the Base::getBaseComponent method having a Client instance only.

Java
JUNIOR
Tested skills
Duration
39 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Java, Spring Boot, JPA

Code gaps

assessing knowledge of Java

Programming task - Level: Easy

Java | Spring Boot with JPA queries - Implement SQL queries to find the best streaming platform.

Java
SENIOR
Tested skills
Duration
78 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of GIT

Code gaps

assessing knowledge of Java

Programming task - Level: Hard

Java | Internet Banking System Decryption Service - Implement methods related to cryptography.

PHP
JUNIOR
Tested skills
Duration
67 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of PHP, Symfony

Code gaps

assessing knowledge of Command, PHP, Symfony, Controller, Routing

Programming task - Level: Easy

PHP | Symfony | Prototype of the CLI tool - Create a CLI command using Symfony's Console Commands. The command should validate a string passed as an argument.

JavaScript
MIDDLE
Tested skills
Duration
62 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of JavaScript, Redux

Code gaps

assessing knowledge of HTML, HTML5, CSS

Programming task - Level: Medium

JavaScript | Redux Selectors | HR Department Trainings - Implement redux reducers and selectors correctly.

Flutter
SENIOR
Tested skills
Duration
81 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of FLUTTER, HotReload, WidgetKeys, Dart, Stream

Code gaps

assessing knowledge of Dart, FLUTTER, FlutterWidgets, Navigator

Programming task - Level: Hard

Flutter | Dart | Employees Catalogue Application - Implement search with filters for the list with employees.

.NET
MIDDLE
Tested skills
Duration
44 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of .NET, Desktop & Mobile applications, Windows Presentation Foundation

Code gaps

assessing knowledge of .NET, C#, Desktop & Mobile applications, Windows Presentation Foundation

Programming task - Level: Medium

.NET | WPF | User Data Registration WPF Module - Finish the implementation meeting requirements such as set proper layouts, styles, and binding for specified components.

React Native
MIDDLE
Tested skills
Duration
107 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of React Native

Code gaps

assessing knowledge of JavaScript, React Native

Programming task - Level: Medium

React Native | Cheeper - a new social media app - Finish the implementation so that basic socializing would be possible.

.NET
JUNIOR
Tested skills
Duration
52 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of .NET, C#, .NET Core, Basic Common topics, Logging

Code gaps

assessing knowledge of .NET, C#, .NET Core, .NET Internals, dotnet restore

Programming task - Level: Easy

.NET | .NET Core | Banking System Configuration Module - Complete the implementation of one of the banking system modules used to handle the configuration parameters.

This task verifies knowledge of C# classes, interfaces, and inheritance.

Java
MIDDLE
Tested skills
Duration
47 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Java, Spring Boot, Hibernate

Code gaps

assessing knowledge of Hibernate, Java, JPA

Programming task - Level: Medium

Java | Spring Boot, JPA | Repositories - Implement all methods in the ItemRepository class.

Android
MIDDLE
Tested skills
Duration
61 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Android

Code gaps

assessing knowledge of Android, Kotlin

Programming task - Level: Medium

Android | Kotlin | Notepad app - Complete basic functionalities of a note-taking application using RecyclerView.

.NET
JUNIOR
Tested skills
Duration
53 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of .NET, C#, .NET Core, Basic Common topics, Logging

Code gaps

assessing knowledge of .NET, Basic Common topics, C# basics, .NET Core, .NET Internals, dotnet build

Programming task - Level: Easy

.NET | .NET Core, C# | Bank interface for Internet Banking System - Implement a CreateTransfer method which sould check and save the proper data, and a SearchTransfer method which should filter and return the proper information.

C++
SENIOR
Tested skills
Duration
69 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of GIT, C++

Code gaps

assessing knowledge of C++, Templates

Programming task - Level: Hard

C++ | Object Shared Thread Guard - Implement a tool for your team for thread-safe access and manipulation of data in a multithreaded environment.

Angular
MIDDLE
Tested skills
Duration
77 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Angular, JavaScript, Typescript

Programming task - Level: Medium

JavaScript | Angular | Notepad App - Complete simple notes application using provided NotesService to save and read notes.

Java
JUNIOR
Tested skills
Duration
39 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Core Java, Java, Lambda Expressions, Memory Management

Code gaps

assessing knowledge of Core Java, Java, collections, Memory Management, Lambda Expressions

Programming task - Level: Easy

Java | Core Java | Time Service - Implement solutions based on your knowledge of Java Time API.

TypeScript
MIDDLE
Tested skills
Duration
73 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of JavaScript, Typescript

Code gaps

assessing knowledge of JavaScript, Typescript

Programming task - Level: Medium

TypeScript | NestJS | My Barista App - Coffee Recommendation - Implement NestJS REST service for rating and recommending coffee types.

Recommended roles for DevSkiller code tests

We have coding tests available for a range of roles and positions at every level. Without naming all of them, here are just a handful of positions you can test for with our code tests:

  • .NET/C# developer
  • Blockchain engineer
  • C/C+ developer
  • COBOL developer
  • Data Science developer
  • DevOps developer
  • Go developer
  • Groovy developer
  • HTML/CSS developer
  • iOS developer
  • Java developer
  • JavaScript developer
  • Kotlin developer
  • NoSQL developer
  • PHP developer
  • Python developer
  • QA developer
  • React Native developer
  • Ruby on rails developer
  • Scala developer
  • Security engineer
  • SQL developer

How our coding tests work

All DevSkiller coding tests are powered by the RealLifeTesting Methodology™. This form of testing is totally unique to DevSkiller and provides valuable insight into the candidate’s skills. It works by testing with real-world problems and tasks that they are likely to face on the job. This methodology will not only provide a clear understanding of the candidate’s coding skills but also their critical thinking, problem-solving ability, and time management skills.

Key features: DevSkiller code tests

  • Determine the candidate’s coding ability and not just their academic knowledge
  • Remote testing means invites can be sent anywhere in the world, at any time
  • The RealLifeTesting™ methodology offers a greater user experience where candidates can use their own IDE, clone to GIT, run unit tests, and access Stack Overflow/GitHub/Google for research.
  • Strict anti-plagiarism tools that ensure test accuracy
  • Observe tests in real-time
  • Automatically generated results that non-technical professionals can understand
  • Coding tests available for junior, middle, and senior-level positions

Build your own custom tests

Want to start testing your developer candidates using your own codebase? No problem! With DevSkiller and our online task wizard, building your very own custom tests has never been easier. Choose the languages, resources, and skills you want to test, set the test difficulty and duration, plus loads more. Finding the right candidate today with DevSkiller and our coding test catalog.

Still not sure about DevSkiller coding tests?

We understand that it’s important to think carefully before making financial decisions for your company. Rather than listening to us, why not have a read about what one of our many satisfied customers have to say about DevSkiller code tests.

Plutora

Plutora is a leading player in value stream management, with release, test environment, and analytics solutions for enterprise IT. Prior to implementing DevSkiller, Plutora used phone interviews to preselect their candidates. Those who passed were invited to a technical interview which was followed by a behavioral interview. The lack of automation in this process meant that it required a lot of manual work on their side. Also, the effectiveness of phone screening was insufficient and meant many candidates progressed to the interview stages.

The decision was made to introduce DevSkiller coding tests to help automate the technical screening process, limit the number of interviews, and identify the right candidates before the interview stage. With the successful implementation of DevSkiller code tests, Plutora was able to save approximately 8 hours per candidate of their internal development team. That’s because they don’t have to spend time interviewing weak candidates.

“Thanks to automating the screening stage, we were able to reduce the interview rate by 50%. At the same time, the quality of candidates who make it to the interview stage is now much greater. DevSkiller adds an extra layer of quality to our technical hiring process”  – Richard Williams – VP of engineering at Plutora

Frequently asked questions

What is RealLifeTestingTM?

The RealLifeTestingTM methodology serves as the basis of all DevSkiller coding tests. This form of testing is unique because unlike other methods of screening like games or algorithmic puzzles, RealLifeTestingTM provides a 360-degree view of a developer’s skills. The central belief of this methodology is that the most accurate way to evaluate the developmental skills of a candidate is through work sample tests that mirror the actual work they’ll be doing on the job. DevSkiller coding tests task candidates with building full project apps or adding features to existing apps, just like they’ll be doing after being hired. To be successful, candidates must display their knowledge of coding and resources such as Stack Overflow to come up with solutions and problem solving for any issues they encounter. The results will provide insight into the candidate’s academic knowledge, coding skill, decision making, code cleanliness, and problem-solving ability.

How are DevSkiller online tests evaluated?

The DevSkiller platform gets to work as soon as the candidate finishes their test. The results are automatically generated into a report that even a non-techncial recruiter can understand. Candidates are graded on whether the solution would run (an essential factor in all software development), whether or not there are any errors  in the code, code quality, and how it works in edge cases. DevSkiller coding tests are also subject to a series of robus plagiarism features that compare results to previous solutions from other candidates.

How do candidates take a DevSkiller code test?

DevSkiller code tests are fully remote and can be sent anywhere in the world. All the recruiter needs to do is send the candidate a test invite. DevSkiller code tests can be set to be available for a specific amount of time, for example, within 3 days. Candidates can elect to start the test at a time of their choosing, and they have the option of using our state of the art in-browser IDE or completing the project on their favorite IDE and then cloning the project to GIT. As candidates are taking the test, they can elect to run unit tests to make sure their solutions work as they’re supposed to. DevSkiller predefined coding tests have a set time limit. Once the time expires, the code test is automatically evaluated and the report is sent to the recruiter.

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