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About the test:

The Ruby on Rails Online Test uses scenario-based MCQs to evaluate candidates' proficiency in creating and managing models, controllers, and views in Rails, working with databases using ActiveRecord, implementing RESTful APIs, and writing efficient and maintainable code using Ruby. Other important topics that are covered in the test include testing and debugging Rails applications, and deploying and scaling Rails applications on cloud platforms.

Covered skills:

  • Ruby Basics
  • Looping with Ruby
  • Control Flow in Ruby
  • Array and Hashes
See all covered skills

9 reasons why
9 reasons why

Adaface Ruby on Rails Online Test is the most accurate way to shortlist RoR Developers

Reason #1

Tests for on-the-job skills

The Ruby on Rails Online 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 expensive engineering time by filtering out unqualified candidates.

The Adaface Ruby on Rails test screens candidates for the typical skills recruiters look for in a Ruby on Rails developer:

  • Expertise with using Ruby programming knowledge and Ruby on Rails framework.
  • Efficient with Ruby on Rails APIs
  • Solid understanding of OOPs concepts (Data Abstraction, Encapsulation, Inheritance, Polymorphism)
  • Proficient with code versioning tools such as Git
  • Familiarity with concepts such as MVC and Mocking

The insights generated from this assessment can be used by recruiters and hiring managers to identify the best candidates for the role. Anti-cheating features enable you to be comfortable with conducting assessments online. The Ruby on Rails Developer Online Test is ideal for helping recruiters identify which candidates have the technical skills to do well on the job.

The idea behind this online Ruby on Rails quiz is to help you assess on-the-job Ruby on Rails concepts, Core Ruby knowledge, coding, and debugging skills with just one test.

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.

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.

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

🧐 Question


Movie query problem
Our intern created the following model scope
and they want to use in this view:
Which of these code snippets they use to fetch the correct results, and avoid the N+1 query issue?
🧐 Question🔧 Skill


Movie query problem
4 mins
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Movie query problem
Hard4 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 Ruby on Rails 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.

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the Ruby on Rails 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 & comparative results

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

About the Ruby on Rails Developer Role

Ruby is a high-level, general-purpose programming language that was designed and developed in the mid-1990s by Yukihiro "Matz" Matsumoto.

Ruby on Rails, or simply referred to as Rails, is a server-side web app framework written in Ruby programming language. Rails has a MVC (model–view–controller) framework and encourages the use of web standards such as JSON or XML for data transfer and HTML, CSS, and JavaScript for user interfacing.

Typical Ruby on Rails Developer responsibilities include:

  • Designing, developing, and maintaining efficient, reusable, and reliable Ruby code
  • Integration of user-facing elements with server-side logic
  • Identifying and resolving bottlenecks and bugs in the code
  • Integration of data storage solutions, for example, databases

What roles can I use the Ruby on Rails Test for?

  • RoR Developer
  • RoR Programmer
  • Ruby on Rails Application Developer
  • Web Developer
  • Back-End Developer

What topics are covered in the Ruby on Rails Online Test?

OOPs concepts

RSpec is a unit test framework for the Ruby programming language.

Basics of Ruby

The Rails router recognizes URLs and dispatches them to a controller's action, or to a Rack application.

URL routing
Monkey patching

Rails Active Records provide an interface and binding between the tables in a relational database and the Ruby program code that manipulates database records.

Active Record
Action Cable

A control flow construct is a language feature which disrupts the normal progression to the next statement and conditionally or unconditionally branches to another location in source code.

Control Flow

A Rails Model is a Ruby class that can add database records, find particular data one is looking for, update data, or remove data.

Working with Files

Metaprogramming is writing programs that write programs.

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


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.

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
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser

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.

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40 min tests.
No trick questions.
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