Ruby Interview Questions

A curated collection of Ruby and Rails interview questions, answers, and runnable examples.

This repository is organized to help learners and interviewers quickly find high-quality prompts, canonical answers, and small runnable snippets that demonstrate key Ruby and Rails concepts.

Top-level layout

• questions/ — categorized prompts (beginner, intermediate, advanced, rails)
• answers/ — canonical answers in Q&A format that mirror the questions/ structure
• examples/ — small runnable Ruby and Rails example scripts (snippets and Rails-patterns)
• docs/ — contribution guide, style and question format

Quick start — run examples These examples are plain Ruby files and can be run without Rails or extra gems.

ruby examples/snippets/blocks_examples.rb ruby examples/snippets/metaprogramming_examples.rb ruby examples/snippets/concurrency_examples.rb ruby examples/rails/service_object_example.rb

How to contribute

• Read docs/how-to-contribute.md for the workflow and file templates.
• Add new questions under questions/<level>/ and matching answers under answers/<level>/ using the Q&A format.
• For runnable examples, prefer small, dependency-free scripts under examples/ that demonstrate a single concept.

Question & answer format

• See docs/question-format.md for the required Q&A layout and front-matter conventions used in this repository.

Style

• Follow the recommendations in docs/style-guide.md for writing clear questions and concise answers.

Thanks for contributing — check CONTRIBUTING.md for common scenarios and PR templates.