Ruby Online Test

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About the test

The Ruby online test assesses knowledge of programming in the Ruby language. This test requires solving live coding problems in Ruby.

The assessment includes work-sample tasks such as:

  • Serializing to/from JSON to handle web requests.
  • Finding and fixing bugs, and handling exceptions.
  • Extracting data from text using Regex.

A good Ruby developer needs a solid understanding of the Ruby programming language and knowledge of its data structures and language constructs to write robust and maintainable code.

Sample public questions

Hard
10 min
code
Public
Ruby
Closures
Higher Order Function

As part of a data processing pipeline, complete the implementation of the pipeline method:

  • The pipeline method should accept a variable number of functions, and it should return a new function that accepts one parameter arg.
  • The returned function should call the first function in pipeline with the parameter arg, and call the second function with the result of the first function.
  • The returned function should continue calling each function in pipeline in order, following the same pattern, and return the value from the last function.

For example, calling pipeline(-> (x) { x * 3 }, -> (x) { x + 1 }, -> (x) { x / 2 }), and then calling the returned function with 3 should return 5.

Easy
10 min
code
Public
Ruby
Arithmetic

Implement the function find_roots to find the roots of the quadratic equation: ax2 + bx + c = 0. The function should return an array containing both roots in any order. If the equation has only one solution, the function should return that solution as both elements of the array. The equation will always have at least one solution.

The roots of the quadratic equation can be found with the following formula: A quadratic equation.

For example, find_roots(2, 10, 8) should return [-1, -4] or [-4, -1] as the roots of the equation 2x2 + 10x + 8 = 0 are -1 and -4.

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19 more premium Ruby questions

Document Store, Ranges, Shipping, Category Tree, Chain Link, Hobbies, Username, Crop Ratio, String Occurrence, Segment, Read Write Execute, Read First Line, Greeter, Language Teacher, Log Patch, Date Transform, Students, Numbers To Text, Paragraph.

Skills and topics tested

  • Ruby
  • Bug Fixing
  • Language
  • Ranges
  • Arithmetic
  • Exceptions
  • Hash
  • Linked List
  • Arrays
  • Iteration
  • Regex
  • Strings
  • Integer Division
  • Stream
  • Inheritance
  • OOP
  • Monkey Patching
  • JSON
  • Serialization
  • Sorting

For job roles

  • Back-End Developer
  • Ruby Developer
  • Web Developer

Sample candidate report

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Simple, straight-forward technical testing

TestDome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.

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Product reviews

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G2 - High Performer (2022)
Capterra - 4.5 Stars
Capterra - Shortlist (2023)

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