Educative – Grokking the Object Oriented Design Interview

Educative – Grokking the Object Oriented Design Interview is a hands-on online course that helps you master object-oriented design interview questions through structured lessons and real-world case studies. Instead of guessing how to design complex systems on the spot, you follow a clear process for turning vague requirements into clean classes, relationships and interactions. The goal is to make you confident in low-level and object-oriented design interviews at modern tech companies.

In this course you combine theory, diagrams and interactive coding playgrounds. You review core OOP concepts, work with UML diagrams and then practise on a curated set of design problems such as library management, parking lots, online shopping systems and social networks. By solving these step by step, you build the mindset, vocabulary and patterns that interviewers expect when they say “design this system using objects”.

Educative – Grokking the Object Oriented Design Interview is created by Design Gurus, a team of hiring managers and senior engineers from companies like Google, Facebook, Microsoft and Amazon. The curriculum is organised into focused lessons and case studies with built-in coding environments, so you can experiment with class structures and interfaces directly in the browser as you learn.

What is the Educative – Grokking the Object Oriented Design Interview course about?

Educative – Grokking the Object Oriented Design Interview is a complete guide to preparing for object-oriented design interviews. It tackles the two main challenges most engineers face: lack of experience designing medium to large systems and the open-ended, unstructured nature of OOD interview problems.

The course starts with object-oriented basics and Unified Modeling Language (UML), showing you how to express ideas clearly using classes, relationships, use cases, activity diagrams and sequence diagrams. After that, you move into a series of practical case studies that mirror real interview questions: designing systems such as a library, a parking lot, an ATM, an online shopping platform, a hotel, LinkedIn, Facebook and more. For each case, you are guided through requirements clarification, use case identification, class design and interaction modelling.

The emphasis is on learning a repeatable, communication-friendly approach that you can use in any OOD interview, rather than memorising one-off solutions.

What will you learn in Educative – Grokking the Object Oriented Design Interview?

By completing Educative – Grokking the Object Oriented Design Interview and working through the interactive lessons, you will learn how to:

• Review and strengthen core OOP principles such as abstraction, encapsulation, inheritance and polymorphism and apply them in interview settings.
• Use UML effectively, including class diagrams, use case diagrams, activity diagrams and sequence diagrams, to communicate designs clearly to interviewers.
• Follow a consistent process to clarify requirements, identify key use cases and define system boundaries before jumping into classes.
• Identify main objects, their attributes and behaviours for common problem domains like libraries, parking lots, ATMs, booking systems and social networks.
• Model relationships between classes, including associations, composition, aggregation and inheritance, with a clear justification for each decision.
• Design flexible class hierarchies that support future changes without becoming overly complex or tightly coupled.
• Translate high-level requirements into low-level design with clear responsibilities and separation of concerns.
• Discuss trade-offs during an interview, explaining why you chose a particular design and how it could evolve as requirements change.
• Practise with multiple, repeatedly asked OOD interview questions so you are familiar with patterns that top tech companies like to use.
• Gain confidence using interactive coding playgrounds to sketch out key classes, methods and interfaces while you reason about design.

Who is this course for?

Educative – Grokking the Object Oriented Design Interview is designed for software engineers who want to feel prepared and confident in object-oriented and low-level design interviews. It is especially useful if you:

• Are preparing for software engineering interviews at big tech companies or startups where OOD questions are a standard part of the process.
• Know how to code but struggle to structure larger problems into clean, maintainable designs during interviews.
• Have read about design patterns and UML but want a guided, interview-focused way to apply them to realistic problems.
• Prefer learning by working through complete case studies rather than just reading abstract theory.

The course is aimed at beginner to intermediate-level engineers who are comfortable with at least one object-oriented language such as Java, C++, C# or Python, and who want to refine their design thinking for interviews and real projects.

How does Educative – Grokking the Object Oriented Design Interview work?

Educative – Grokking the Object Oriented Design Interview is delivered as an online, self-paced course with around twenty-two hours of study material. The curriculum is split into short lessons and case studies, making it easy to fit study sessions around work or school. You do not need to install any tools: all code examples and exercises run in interactive browser-based playgrounds.

The first part of the course builds your foundation with object-oriented basics, analysis and design concepts and UML. Each lesson introduces a concept, gives you visual explanations and then invites you to explore it through diagrams and code snippets. The second part consists of detailed case studies. For each system, you read a problem statement, walk through requirements, sketch use cases and diagrams, then refine the design into classes and interactions.

You can move through the content in order or return to specific problems for targeted practice. Because the course is hosted online, you can revisit the material whenever you want a refresher before interviews.

Benefits of studying Educative – Grokking the Object Oriented Design Interview

• Interview-focused structure: all examples and case studies are chosen from real OOD interview questions asked at major tech companies.
• Hands-on practice: the combination of diagrams and interactive coding environments helps you connect design ideas with actual implementation.
• Clear communication skills: by practising UML and structured explanations, you learn how to talk through your design in a way interviewers appreciate.
• Reusable mental models: once you have worked through the case studies, you can reuse the same approach for new, unfamiliar problems.
• Time-efficient preparation: short, focused lessons let you make consistent progress without needing long uninterrupted blocks of time.

Prerequisites and important considerations

The course assumes you have basic experience with programming and at least one object-oriented language. You should be comfortable with variables, loops, functions and simple classes before starting. Prior exposure to inheritance, interfaces or design patterns is helpful but not strictly required.

Educative – Grokking the Object Oriented Design Interview is an educational resource. It does not guarantee job offers, specific interview outcomes or any particular salary level. The examples, diagrams and exercises are designed to help you think more clearly about design, but your results will always depend on your overall preparation, communication skills, interview performance and the specific company processes. The course does not provide legal, tax or medical advice, and you remain responsible for how you apply the knowledge in your own projects and interviews.

About the academic institution and authors

Educative – Grokking the Object Oriented Design Interview is created by Design Gurus, a group of hiring managers and senior engineers from top technology companies such as Google, Facebook, Microsoft and Amazon. Their experience on both sides of the interview table shapes the case studies, solution walkthroughs and interview tips included in the course.

The same team also produces other well-known “Grokking” interview courses, focusing on coding patterns, system design and algorithm complexity. Their goal is to provide concise, practical resources that condense years of interview experience into focused, hands-on learning paths for software engineers.

Why buy from our online course platform?

Purchasing Educative – Grokking the Object Oriented Design Interview through our online course platform allows you to keep this interview preparation resource in the same place as your other technical courses. You can track your progress, organise your study plan and quickly return to specific lessons or case studies whenever you schedule interviews.

Centralize your digital purchases in a single account, keep your history, and access them whenever you want to watch online or download. Plus, you’ll always find courses on our platform at affordable prices.

Course content – Educative – Grokking the Object Oriented Design Interview

The curriculum of Educative – Grokking the Object Oriented Design Interview is organised into chapters that combine theory, diagrams and case-study practice:

• Object Oriented Design and UML (7 lessons): introduction to object-oriented basics, OO analysis and design, an overview of UML and how to use use case diagrams, class diagrams, activity diagrams and sequence diagrams to express your designs.
• Object Oriented Design Case Studies (16 lessons): a collection of complete interview-style problems, including:
  • Design a Library Management System
  • Design a Parking Lot
  • Design Amazon – Online Shopping System
  • Design Stack Overflow
  • Design a Movie Ticket Booking System
  • Design an ATM
  • Design an Airline Management System
  • Design Blackjack and a Deck of Cards
  • Design a Hotel Management System
  • Design a Restaurant Management System
  • Design Chess
  • Design an Online Stock Brokerage System
  • Design a Car Rental System
  • Design LinkedIn
  • Design Cricinfo
  • Design Facebook – a social network
• Appendix (2 lessons): additional course information and links to related resources.

Each case study follows a consistent structure so you can compare approaches and internalise a repeatable method for future interviews.

Use Educative – Grokking the Object Oriented Design Interview to build a solid, interview-ready object-oriented design toolkit and approach each design question with a calm, structured plan.

Downloadable Course Content