Search test library by skills or roles
⌘ K

About the test:

The REST API Test evaluates a candidate's understanding of RESTful APIs and their ability to create, interact, and test them. The test includes multiple-choice questions to evaluate knowledge of REST principles, HTTP methods, status codes, authentication, serialization formats, and best practices.

Covered skills:

  • Technical Aptitude
  • REST API Basics
  • Best Practices
  • Coding
  • API integrations
  • API Design
  • Designing Backend Services

9 reasons why
9 reasons why

Adaface REST API Assessment Test is the most accurate way to shortlist Software Engineers

Reason #1

Tests for on-the-job skills

The REST API Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

  • Ability to understand and implement REST API concepts
  • Strong technical aptitude and problem-solving skills
  • Knowledge of best practices for API design and integration
  • Experience in designing backend services
  • Proficiency in coding and problem-solving
  • Ability to effectively use API integrations
  • Understanding of REST API basics and principles
  • Ability to design efficient and scalable APIs
  • Knowledge of common API authentication and authorization mechanisms
  • Experience in implementing error handling and exception management in APIs
  • Ability to optimize API performance and response times
  • Familiarity with API testing and debugging tools
Reason #2

No trick questions

no trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface
Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

These are just a small sample from our library of 10,000+ questions. The actual questions on this REST API Test will be non-googleable.

🧐 Question


Given a service that returns information about bikes, including the various drivers of each bike, what might the URIs look like for 1) getting the second driver of the third bike? 2) getting all of the drivers of the fifth bike?


What does the following pseudo code print?


Fibonacci codes
Time Complexity
Pseudo Code
Here are three pseudocodes for calculating the Nth Fibonacci number. Which of the following statements about these codes are true?
A: Time complexity/efficiency of CODE 1, CODE 2, CODE 3 is the same.
B: CODE 2 is more space-efficient than CODE 3.
C: CODE 3 is more space-efficient than CODE 2.
D: CODE 2 is more time-efficient than CODE 1.
E: CODE 3 is more time-efficient than CODE 1.


Palindrome Test cases
Go through the following faulty palindrome detection pseudocode and test cases. For which of the test cases would the code return true?
A: a
B: aba
C: aaa
D: aac


Rewards Activities Order
Database Connection
A new popular app tracks the activities performed by its users and grants them rewards based on each individual's total activities performed in a year. This data is maintained in a database table (activitesinfo), with the following columns: userid, totalactivities, reward. This year, due to fundraising activity, the company has decided to further reward its users by enhancing the reward as per the following formula: If reward < = 4000, increase it by 2%, If 4000 < reward <= 8000, increase it by 4%, If reward > 8000, increase it by 6%.
The tech team has written three different scripts to calculate increment for each slab, each script is to run as a separate transaction. Here are the three scripts:
Script 1:
For users with reward <= 4000, set reward = reward * 1.02

Script 2:
For users with reward > 4000 and reward <= 8000, set reward = reward * 1.04

Script 3:
For users with reward > 8000, set reward = reward * 1.06
Each script is to be executed separately. Which of the following options will update the rewards as expected:
A: Execute Script 1 followed by Script 2 followed by Script 3
B: Execute Script 2 followed by Script 3; Script 1 running concurrently throughout
C: Execute Script 3 followed by Script 2; Script 1 running concurrently throughout
D: Execute Script 3 followed by Script 2 followed by Script 1
E: Execute Script 2 followed by Script 3 followed by Script 1
🧐 QuestionπŸ”§ Skill



2 mins




2 mins

Technical Aptitude


Fibonacci codes
Time Complexity
Pseudo Code

2 mins

Technical Aptitude


Palindrome Test cases

2 mins

Technical Aptitude


Rewards Activities Order
Database Connection

3 mins

Technical Aptitude
🧐 QuestionπŸ”§ SkillπŸ’ͺ DifficultyβŒ› Time
Easy2 mins
Technical Aptitude
Medium2 mins
Fibonacci codes
Time Complexity
Pseudo Code
Technical Aptitude
Hard2 mins
Palindrome Test cases
Technical Aptitude
Hard2 mins
Rewards Activities Order
Database Connection
Technical Aptitude
Medium3 mins
Reason #4

1200+ customers in 75 countries

customers in 75 countries

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!

Brandon Lee, Head of People, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment REST API Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests
Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the REST API Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

invite candidates
Reason #7

Detailed scorecards & benchmarks

View sample scorecard
Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

test completion rate
Reason #9

Advanced Proctoring

Learn more

About the REST API Online Test

Why you should use Pre-employment REST API Test?

The REST API Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

  • Understanding of REST API basics
  • Knowledge of API integrations
  • Experience in designing backend services
  • Familiarity with API design principles
  • Ability to apply best practices in API development
  • Proficiency in coding
  • Understanding of technical aptitude
  • Ability to handle exceptions and errors
  • Experience with database design and management
  • Knowledge of authentication and authorization processes

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the REST API Test?

  • Technical Aptitude

    Technical Aptitude refers to the ability to understand and apply technical concepts, solve technical problems, and think critically in a technical environment. This skill is essential to assess as it reflects a candidate's overall technical proficiency and their ability to adapt to new technologies.

  • API Integrations

    API Integrations involve connecting different systems or applications through the use of Application Programming Interfaces (APIs) to enable seamless data exchange and functionality. Assessing this skill is crucial as it demonstrates a candidate's ability to work with external systems, understand API documentation, and successfully integrate third-party services.

  • REST API Basics

    REST (Representational State Transfer) API Basics encompass understanding the fundamentals of RESTful architecture, HTTP methods, resource identification, and data modeling. Evaluating this skill is important as it gauges a candidate's knowledge of REST principles and their ability to design and develop APIs that follow industry standards.

  • API Design

    API Design involves creating well-structured and intuitive interfaces for the communication and interaction between software components. Measuring this skill is vital as it assesses a candidate's ability to design APIs that are scalable, maintainable, and provide a positive user experience for developers.

  • Best Practices

    Best Practices encompass following established guidelines and industry standards to ensure optimal performance, security, and efficiency in API development. Evaluating this skill is necessary to determine a candidate's understanding of industry norms and their capability to implement robust and reliable APIs.

  • Designing Backend Services

    Designing Backend Services involves creating the server-side logic, databases, and infrastructure required to support the functionality and data processing of an application or system. Assessing this skill is crucial as it reflects a candidate's ability to architect and build the backbone of an application, ensuring its reliability, scalability, and optimal performance.

  • Coding

    Coding refers to the ability to write clean, efficient, and well-structured code using programming languages and frameworks. Measuring this skill is essential as it determines a candidate's proficiency in translating design and business requirements into functional code and their capability to identify and fix issues within the codebase.

  • Full list of covered topics

    The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for REST API Test to be based on.

    HTTP methods
    API authentication
    API authorization
    Resource identification
    URL structure
    API versioning
    Response formats (JSON, XML, etc.)
    Sorting and filtering data
    HTTP status codes
    HTTP headers
    Handling query parameters
    Handling request payloads
    Error handling and error codes
    Rate limiting
    Data validation
    Request throttling
    Token-based authentication
    Cross-origin resource sharing (CORS)
    API documentation
    API version control
    SSL/TLS encryption
    API scalability
    Backend architecture design
    Database integration
    API performance optimization
    API security best practices
    API testing tools
    API debugging tools
    API design patterns
    API testing methodologies
    API load testing
    Code version control
    Integration testing
    Unit testing
    Exception handling
    Code refactoring
    Asynchronous programming
    Database management
    Data modeling
    RESTful web services
    Service-oriented architecture (SOA)
    JSON parsing
    XML parsing
    API mocking
    Endpoint design
    Request and response validation
    API governance
    API lifecycle management
    Microservices architecture
    Serverless computing
    API monitoring
    API analytics

What roles can I use the REST API Test for?

  • Software Engineer
  • DevOps Engineer
  • QA Engineer
  • Backend Developer
  • Full Stack Developer
  • Mobile App Developer
  • Cloud Engineer
  • Automation Engineer
  • System Administrator
  • Technical Lead

How is the REST API Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

  • Understanding of version control systems
  • Proficiency in data structures and algorithms
  • Experience with performance optimization techniques
  • Ability to troubleshoot and debug code
  • Knowledge of system integration and scalability
  • Understanding of software development methodologies
  • Experience in unit testing and test-driven development
  • Familiarity with web security practices
  • Ability to write efficient and maintainable code
  • Knowledge of cloud computing and serverless architecture
  • Understanding of distributed systems and messaging protocols

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.

reduction in screening time

REST API Hiring Test FAQs

Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

  • Non-googleable questions
  • IP proctoring
  • Screen proctoring
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser
  • Copy paste protection

Read more about the proctoring features.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

What is the cost of using this test?

You can check out our pricing plans.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

customers across world
Join 1200+ companies in 75+ countries.
Try the most candidate friendly skills assessment tool today.
g2 badges
Ready to use the Adaface REST API Test?
Ready to use the Adaface REST API Test?
40 min tests.
No trick questions.
Accurate shortlisting.
Terms Privacy Trust Guide
● Online
Score: NA