Ruby Interview Coding Exercises

DevSkiller interview coding exercises have been specially designed by our expert team to assist in the recruitment of Ruby developers of any level of expertise. Ruby interview questions challenge candidates with a series of tests and tasks, in order to help you find the perfect Ruby developer.

Our Ruby interview coding exercises are powered by the RealLifeTesting™ methodology, a unique way of testing candidates, which works by replicating real-world scenarios and challenges for your applicants to solve. Finding your next Ruby Developer is easier than ever with our unique range of coding exercises.

Technologies covered:

Programming language: Ruby

Ruby frameworks and libraries: Ruby on Rails

Build tools: Rake

Ruby on Rails
Tested skills
70 minutes max.
Test overview

Choice questions

assessing knowledge of Ruby on Rails

Code gaps

assessing knowledge of Ruby, Ruby on Rails

Programming task - Level: Easy

Ruby on Rails | Game of Chairs | Prevent duplicate character - Create and organize data for the TV show - Game of Chairs.

Tested skills
40 minutes max.
Test overview

Choice questions

assessing knowledge of Ruby on Rails

Programming task - Level: Medium

Ruby | Ruby on Rails | Flight manager app | Seats reservation and flights analysis - Implement missing features of the flights' data management application like seats reservation and flights analysis.

Recommended roles for Ruby interview coding exercises

  • Full-stack developer
  • Web developer
  • Ruby developer
  • Ruby on rails developer
  • Junior Rails developer
  • Middle Rails developer
  • Senior Rails developer

How DevSkiller Ruby interview coding exercises work

DevSkiller Ruby interview coding exercises are unique in that they implement RealLifeTesting™, an advanced testing methodology that analyzes an applicant’s knowledge of Ruby within a controlled and predefined test environment. Assessment is based on coding ability, problem-solving, and the candidate’s ability to time-manage effectively.

Exercises are assessed automatically on completion and an easy to understand report is automatically generated showing the results, making the DevSkiller system an effective and efficient tool to aid in your company’s recruitment process.

Key features

  • Analyze Ruby coding ability and not just academic ability
  • Exercises are worked on remotely to save time and money
  • 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.
  • DevSkiller implements strict anti-plagiarism tools to ensure accuracy
  • Observe tests in real-time
  • Automated results that non-technical recruiters can understand
  • Tests available for junior, middle, and senior-level Ruby positions

Skills covered in our Ruby interview coding exercises

  • Ruby
  • Ruby on Rails
  • SQLite
  • Regular Expressions

What to look for in a Ruby developer

Ruby is a dynamic, general-purpose programming language quite similar to Python. It was built with a focus on simplicity and productivity and its syntax is remarkably easy to read and write, making it ideal as a server-side scripting language and for use in front-end applications.

In looking for a new Ruby developer, it is important to take into consideration that Ruby and Ruby on Rails are not one and the same. Ruby is a programming language, whereas Ruby on Rails is a framework that simply uses the Ruby language. There are other frameworks that use the Ruby language too, like Sinatra for instance, so it is important to find out which framework your developer uses.

A Ruby developer will also need to possess knowledge of the language’s libraries, which are referred to as gems. The gem system is easy to scale and has developed to the point that it is completely standardized. It is also important for Ruby developers to be up to date with any changes in the language, as a new version of Ruby is released basically every year.

If your business requires a developer that only uses Ruby as a scripting language, then they also need to know the basics of Linux, networks, and other system basics.

Within the Ruby programming language, there are two big libraries for testing, RSpec and minitest. One would expect a decent Ruby developer candidate will know one of these, but a brilliant one will have used both and be able to describe the main differences between them.

Like what you see but want more from Ruby interview coding exercises?

Do you want to cater DevSkiller’s Ruby tests to fully suit your needs? No problem. The DevSkiller online task wizard allows you to build fully customizable tasks, allowing you to choose which languages you test, the time limit allocated and set the difficulty level, and all while still being able to monitor your applicants’ process in real-time. Thanks to DevSkiller, finding your next Ruby developer has never been simpler.

Want proof of the success of Ruby interview coding exercises?

It is understandable to be a little wary of investing your company’s money into our screening tool, so if you’re still unsure, here’s what our other customers have to say:

Sabu Pappu – Talent Acquisition Lead at Veriday

“We have reduced the tech rejection which is great. We’ve seen a 25% improvement at this point after the implementation of DevSkiller. The platform really helps us to assess the programming skills of candidates and provide a logical approach to the problem-solving skills of IT professionals. DevSkiller saved us a lot of time while we had a ramp up and helped us to invite good quality candidates who have performed well in the test, which eventually improved the selection criteria.”

Richard Williams – VP of engineering at Plutora

“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”

Patrycja Kiljańska – Talent acquisition specialist at Spartez

“We’ve replaced a high-maintenance in-house solution with DevSkiller. Our process looks the same, however, the product gives us better performance. The results are also way easier to assess.”

Frequently asked questions

What’s the exercise duration?

Each DevSkiller Ruby interview coding exercise has an in-built, default duration which can be easily altered to suit your company’s preferences. It is also possible to set time limits for individual questions within a test.

How do candidates complete a Ruby interview coding exercise?

Our Ruby interview coding questions are carried out remotely to allow developer candidate’s to access the exercises at a time and place that most suits them, while also saving time and money on in-house testing. All a recruiter needs to do is send out the test invite. Each test invite can be made available for a specific amount of time so there is no waiting around and the candidate can simply complete the test and send it back for evaluation once they’ve finished. Tests are marked automatically. During the exercises, candidates have the option to use our state-of-the-art in-browser IDE or complete the project on their favorite IDE and then clone the project to GIT and they can also run- unit tests to make sure their solutions work.

Can a candidate cheat during a Ruby interview coding exercise?

In short, the answer here is no. At DevSkiller we take plagiarism very seriously and as such, we implement a number of tools, ranging from screen recording, to social listening, to ensure that your business receives only valid results in return. Our plagiarism detector also automatically checks the code each candidate has entered as well as their answers, against those of previous test subjects and automatically flags if there is a match.

Do I need to be a programmer to use DevSkiller?

Certainly not. All of our Devskiller Ruby interview coding exercises are deliberately designed to be as non-technical and as automated as possible. Our ready-to-use tests are prepared by our experts, which takes the pressure off you, while also meaning you can recruit for positions much more advanced than your own personal skill set allows.

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