Universal coding tests

Why limit talent with single-language coding tests? Test 12 essential programming skills in universal coding tests that cover up to 20 languages.

Select from an array of expert-designed challenges covering algorithmic thinking, debugging, and data structures to find your most adaptable and innovative developers.

Test coding skills in any of these programming languages

JAVASCRIPT

Fluency in JavaScript is a telltale sign of a developer's skills in front-end development, user interface manipulation, and interactivity.

JAVA

A strong grasp of Java is a valuable asset for engineers creating enterprise software, web applications, and Android apps.

PYTHON

Python's readability makes it a great way to identify developers with strong problem-solving skills and potential for growth in programming.

PHP

Assessing expertise in PHP can help you identify a developer's core web development abilities, including scripting, debugging, and optimization.

C

C is a foundational language that demonstrates a developer’s ability to write efficient, low-level code and build system-level applications.

C#

A solid grasp of C# is a great indicator of a developer's capabilities in building Windows applications and enterprise software.

C++

A strong grasp of C++ is a valuable asset for engineers creating game engines, operating systems, and performance-critical software.

KOTLIN

Adding the Kotlin language to your test allows programmers to showcase their skills that could translate to building cross-platform applications.

RUBY

With Ruby, developers can showcase their ability to create web applications quickly and efficiently using Ruby on Rails.

TYPESCRIPT

A strong grasp of TypeScript is a valuable asset for developers working on complex, large-scale JavaScript applications.

GO

Go is a valuable asset for developers working with cloud-native applications, scalable microservices, and high-performance systems.

R

A strong grasp of R is a valuable asset for engineers working in data science, bioinformatics, and other fields that rely heavily on statistical computing.

SCALA

Scala allows developers to build web services, data pipelines, machine learning models, and reactive systems. Its mix of functional and object-oriented programming enables scalable, high-performance development.

SWIFT

Swift helps developers build modern iOS, iPadOS, macOS, watchOS, and tvOS apps. Proficiency in Swift ensures efficient, high-performance development using Apple’s intuitive programming language.

PERL

A strong grasp of Perl is a valuable asset for developers maintaining legacy systems, writing configuration scripts, and automating system administration tasks. It also supports efficient text processing and data manipulation across various applications.

DART

Proficiency in Dart highlights an engineer’s ability to build user interfaces and manage application logic within the Flutter framework. This skill enables the development of fast, cross-platform applications for mobile, web, and desktop.

JULIA

With the Julia programming language, candidates working on simulations, data analysis, machine learning, or other computationally intensive tasks can showcase their skills.

RUST

A strong grasp of Rust is a valuable asset for developers creating reliable, performant embedded systems, operating systems components, and high-concurrency applications.

ELIXIR

With Elixir, programmers with skills in functional programming, building scalable and fault-tolerant systems, and concurrency handling can effectively showcase their ability.

ERLANG

Proficiency in Erlang showcases a developer's ability to design and build robust, distributed systems that prioritize uptime and efficient handling of concurrent processes.

Test 12 programming skills in up to 20 coding languages

Let candidates showcase their problem-solving skills and coding expertise in the language they know best—because adaptability and logic matter just as much as syntax.

Coding: Data Structures - Stacks and Queues

This intermediate-level coding challenge assesses candidates' proficiency in manipulating stacks and queues. You can configure which programming languages will be available for your candidates.

35 min

Details

Coding: Debugging

This intermediate-level coding challenge focuses on candidates’ ability to interpret and debug code, based on a set of requirements, in the programming language of their choice. You can configure which programming languages will be available.

35 min

Details

Coding: Entry-Level Algorithms

This coding test assesses candidates' ability to program a basic algorithm, in the programming language of their choice. You can configure which programming languages will be available for your candidates to choose from.

15 min

Details

Coding: Intermediate-Level Algorithms

This coding test assesses candidates' intermediate-level programming skills, in the programming language of their choice. You can configure which programming languages will be available for your candidates to choose from.

35 min

Details

Coding: Data Structures - Heaps

This intermediate-level coding challenge assesses candidates' proficiency in working with heaps, in the programming language of their choice. You can configure which programming languages will be available for your candidates.

35 min

Details

Coding: Data Structures - Graphs

This intermediate-level coding challenge assesses candidates' proficiency in graph data structures. You can configure which programming languages will be available for your candidates.

35 min

Details

Coding: Data Structures - Binary Search Trees

This intermediate-level coding challenge assesses candidates' proficiency in working with binary search trees, in the programming language of their choice. You can configure which programming languages will be available for your candidates.

35 min

Details

Coding: Data Structures – Binary Trees

This intermediate-level, language-agnostic coding challenge assesses candidates' proficiency in manipulating binary trees, enabling candidates to choose their preferred programming language. Employers can configure supported languages as needed.

35 min

Details

Coding: Data Structures – Linked Lists

This intermediate-level coding test evaluates candidates' ability to manipulate linked lists, in the programming language of their choice. You can configure which programming languages will be available for your candidates.

35 min

Details

Coding: Data Structures - Arrays

This intermediate-level coding test evaluates candidates' ability to manipulate arrays, crucial for code optimization, in the programming language of their choice. You can configure which programming languages will be available for your candidates.

35 min

Details

Coding: Data Structures – Strings

This intermediate-level coding challenge assesses candidates' proficiency in manipulating strings. You can configure which programming languages will be available for your candidates.

35 min

Details

Coding: Data Structures - Hash Tables

This intermediate-level coding challenge assesses candidates' proficiency in working with hash tables, in the programming language of their choice. You can configure which programming languages will be available for your candidates.

35 min

Details

Screen for coding ability in a fully configurable development environment

Our universal coding challenges to make sure you can shortlist your best-fit applicants confidently. Empower candidates to choose their preferred programming language so they can prove their algorithmic thinking and problem-solving skills.

Select up to 20 programming languages in one test and set challenges to test your candidates coding skills and knowledge in their preferred language.

Top tech talent is just an assessment away

Find the most candidates with proven programming skills by adding one of our universal coding tests to your assessments today, or book a demo with one of our product advisors.

Start using coding challenges

Ready to give it a go? Build your universal coding assessment now!

Start building your dream team today

Chat with one of our sales reps to see exactly how TestGorilla can save you time in recruitment and reveal top talent, or try out our features on a free plan.

Sign up free

Universal coding test FAQs

At TestGorilla, we use skills-based coding tests to evaluate candidates' expertise. Our library includes 12 tests, each designed to assess key programming principles such as algorithmic thinking, debugging, and data structures.

As a hiring manager, you can create challenges in up to 20 programming languages, allowing candidates to demonstrate their logic and problem-solving skills without restrictions.

Tests are auto-scored, with results ranked using percentile-based benchmarks. Scores are further detailed in a comprehensive coding test report, breaking down performance by correctness and performance. The report provides insights into how candidates tackled the questions and arrived at their solutions.

Universal coding tests prioritize problem-solving and adaptability over specific programming language expertise. By focusing on universal principles like logic and data structures, these tests assess transferable skills and encourage innovative solutions.

This approach broadens your talent pool, reducing biases tied to educational or socio-economic backgrounds, and welcomes candidates with diverse experiences and skills. It also fosters team diversity, creating a more flexible, resilient, and innovative workforce.

Allowing candidates to code in their preferred language improves the candidate experience, reducing anxiety and showcasing their true potential. This enhances your employer brand, attracting top talent to your organization.

Coding: Entry-level Algorithms – Tests basic algorithm programming skills for entry-level coding roles.

Coding: Intermediate-level Algorithms – Assesses intermediate programming skills for mid-level coding roles.

Coding: Debugging – Evaluates the ability to interpret and debug code for software maintenance roles.

Coding: Data Structures - Arrays – Tests array manipulation skills for data processing and optimization roles.

Coding: Data Structures - Linked Lists – Focuses on linked list management for dynamic data handling roles.

Coding: Data Structures - Strings – Assesses string manipulation skills for NLP, data parsing, and UI development roles.

Coding: Data Structures - Binary Trees – Evaluates binary tree knowledge for data sorting, searching, and storage roles.

Coding: Data Structures - Heaps – Tests heap usage for real-time systems and performance optimization roles.

Coding: Data Structures - Hash Tables – Focuses on hash table proficiency for roles needing fast data access and caching.

Coding: Data Structures - Stacks and Queues – Assesses sequential data management for architecture and systems roles.

Coding: Data Structures - Graphs – Tests graph handling skills for network analysis and GPS/navigation roles.

Coding: Data Structures - Binary Search Trees – Focuses on binary search tree management for efficient data organization roles.

Object-Oriented Programming – Evaluates object-oriented design for roles requiring scalable and maintainable code

TestGorilla offers one of the most comprehensive coding test libraries, featuring 400+ scientifically validated tests. These include universal coding tests covering 20 programming languages, such as JavaScript, Python, and Java, as well as frameworks like Node.js and Gatsby.js.

In addition to coding tests, TestGorilla provides a wide range of assessments for cognitive ability, personality and culture, and role-specific skills. Combining these tests in a multi-measure assessment delivers a complete picture of candidates' skills and capabilities.

Language-agnostic tests are also available, focusing on core programming concepts and allowing candidates to code in their preferred language. With tests available in 12 languages, it’s easy to expand the talent pool globally.

The platform simplifies candidate comparison through detailed assessment reports that include overall and test-specific scores, custom question responses, and annotation features for team collaboration. Customization options, including essay-style, multiple-choice, and video response questions, enable assessments to be tailored to specific hiring needs.

Yes, TestGorilla integrates seamlessly with all leading applicant tracking systems (ATS), ensuring that assessments, scores, and candidate insights automatically sync with your existing tools. This integration allows hiring teams to manage everything from their ATS, streamlining workflows and centralizing key information.

For additional flexibility, connectors like Zapier are also available, enabling further customization. TestGorilla’s integrations simplify the hiring process by letting you effortlessly send assessment invites, track candidate progress, and review assessment results—all directly within your ATS.

TestGorilla employs multiple layers of security and anti-cheating measures to ensure the integrity of coding assessments and give you full confidence in the results. These include:

Webcam Monitoring: Regular webcam screenshots (with applicant consent) provide a visual record of test sessions.
IP Address Monitoring: Verifies that the intended applicant is completing the test.
Dynamic Question Pools: Each coding test is supported by a database of possible questions, and candidates are presented with only one question, selected dynamically. Questions are rotated and replaced after reaching a maximum exposure threshold to reduce the risk of leaks.
Timeline Playback: View the candidate’s coding process from start to finish, including any copy-pasted elements (highlighted in yellow) for additional insight into their approach.
Code Validation and Test Cases: Review detailed validation results, including whether the candidate’s solution passed or failed specific test cases.
Functionality Restrictions: Copy-paste is disabled, and full-screen detection prevents candidates from searching for answers online during the test.
Time Limits: Strict time controls ensure assessments are completed promptly, minimizing opportunities for external assistance.