Loading…
5+ curated questions with the same answer shape every time: quick recap, deep dive, pitfalls, and follow-ups. Coverage includes classes and objects, inheritance, attr accessor, class methods, and more.
Suggested path
Topics follow a teaching order. Each answer ends with a clear Next question control so you can move forward without hunting the list.
Ruby OOP basics interview questions cover the object-oriented concepts every junior Ruby developer needs to explain confidently. This module covers class definition and instantiation, the initialize method and constructor arguments, instance variables (@name) and instance methods, attr_accessor/attr_reader/attr_writer and what each generates (no magic — they define getter and setter methods), class methods with self., inheritance with < and calling super, the four OOP pillars in Ruby (encapsulation, abstraction, inheritance, polymorphism) with concrete Ruby examples, public/private/protected method visibility, self in different contexts, and duck typing — why respond_to? is more Ruby than is_a?. Every answer includes a minimal runnable Ruby example.
Full catalog
Topics are ordered for learning. Within each topic, rows are numbered 1–5 globally so you always know where you are. Collapse topics if you want a lighter view — use Expand all when you need the full list again.
Numbers 1–5 follow the order we recommend — click any row to open the full answer, or use the sticky Next link at the bottom of each page to go Q1 → Q5.