Workspace

Dashboard Learn Handbook Labs Practice library Learning paths Review Insights Studios Mock interviews Notebook

Personal workspace · self-hosted

Search

Jump to a problem, path or page

Object-oriented basics · designlab

Dashboard Learn Handbook Labs Practice library Learning paths Review Insights Studios Mock interviews Notebook

Search

Jump to a problem, path or page

Part 1 · Module 1

Object-oriented basics

Build objects that own their rules, expose small contracts and compose without a fragile inheritance tree.

0 of 5 lessons30 min

1.1Classes and objectsUp next6m
1.2Encapsulation protects a rule6m
1.3Abstraction and interfaces6m
1.4Inheritance versus composition6m
1.5Polymorphism and language contracts6m
LabDesigning the Media Library HierarchyFinish “Design Tiffin from a blank page” first30m

Practice what this module teaches

Parking Lot LLDModel spots, tickets, and pricing with clear responsibilities and safe allocation.Foundation35 min Shopping Cart Domain LLDModel cart mutations, version checks and reproducible price quotes.Intermediate40 min Dependency Injection Container LLDResolve object graphs with scopes, cycle detection and deterministic cleanup.Advanced

45 min