Grokking the Low Level Design Interview Using OOD Principles

A battle-tested guide to object-oriented design interviews—developed by FAANG engineers. Master OOD fundamentals and practice real-world interview questions.

Intermediate

215 Lessons

70h

Updated 2 weeks ago

A battle-tested guide to object-oriented design interviews—developed by FAANG engineers. Master OOD fundamentals and practice real-world interview questions.

AI-POWERED

Code Feedback
Mock Interview
Explanations
Prompt

AI-POWERED

Code Feedback
Mock Interview

This course includes

21 AI Prompts
21 AI Feedbacks
30 Playgrounds
28 Quizzes

This course includes

21 AI Prompts
21 AI Feedbacks
30 Playgrounds
28 Quizzes

Course Overview

Low-level design interviews test something most engineers don't practice enough: taking a vague, open-ended prompt as "design a parking lot" or "design Stack Overflow" and turning it into a structured, implementable system with clearly defined classes, relationships, and behaviors. Knowing what inheritance is won't get you through. You need to demonstrate that you can use it to model a real system under time pressure. This course teaches that skill through repetition across 20+ real-world design problems. ...Show More

TAKEAWAY SKILLS

Java

Software Engineering

Prepare For Interview

Object Oriented Design

What You'll Learn

Apply OOP fundamentals, including encapsulation, abstraction, inheritance, and polymorphism, to real design problems

Use SOLID principles and common design patterns (creational, structural, behavioral) to write clean, maintainable systems

Break down open-ended OOD interview problems into requirements, components, and interactions using a bottom-up approach

Design class, use case, sequence, and activity diagrams for 20+ real-world systems (parking lots, elevators, Amazon, LinkedIn, and more)

Implement complete solutions in Java, Python, C++, C#, or JavaScript

Practice with 19 mock interviews simulating real-world FAANG OOD rounds

What You'll Learn

Apply OOP fundamentals, including encapsulation, abstraction, inheritance, and polymorphism, to real design problems

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Course Content

1.

Introduction

This chapter introduces the course, including its prerequisites, structure, strengths, and the target audience.
2.

Cornerstones of Object-Oriented Programming

This chapter covers the background of OOP, focusing on encapsulation, abstraction, inheritance, and polymorphism, ending with a quiz on basics.
3.

Object-Oriented Design

This chapter explores how to conduct object-oriented analysis and design using UML, covering various diagrams like use case, class, sequence, and activity.
4.

Object-Oriented Design Principles

This chapter covers the SOLID design principles: Single Responsibility, Open Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.
5.

Design Patterns

This chapter teaches you about the classification of design patterns, including creational, structural, and behavioral patterns, followed by a quiz.
6.

Real-World Design Problems

1 Lesson

In this chapter, you will discover how to approach and solve real-world design problems using object-oriented principles and methodologies.
7.

Designing a Parking Lot

9 Lessons

This chapter covers the design of a parking lot system, including requirements, UML diagrams, and implementation code to illustrate practical application.
8.

Designing an Elevator System

9 Lessons

This chapter shows the design of an elevator system, detailing the requirements, use case, class, sequence, and activity diagrams, and the implementation code.
9.

Designing a Library Management System

9 Lessons

This chapter teaches you the design of a library management system with requirements, use case, class, sequence, activity diagrams, and implementation code.
10.

Designing the Amazon Locker Service

9 Lessons

This chapter covers the design of the Amazon Locker Service, focusing on requirements, UML diagrams, and implementation code to create a complete system.
11.

Designing a Vending Machine

8 Lessons

In this chapter, you will learn the design of a vending machine, including requirements, use case, class, activity diagrams, and implementation code.
12.

Designing an Online Blackjack Game

8 Lessons

This chapter explores how to design an online blackjack game, covering requirements, use case, class, activity diagrams, and implementation code.
13.

Designing a Meeting Scheduler

9 Lessons

This chapter shows the design of a meeting scheduler system, detailing the requirements, UML diagrams, and implementation code for the complete design.
14.

Designing a Movie Ticket Booking System

9 Lessons

This chapter covers the design of a movie ticket booking system, including requirements, UML diagrams, and implementation code to build the system.
15.

Designing a Car Rental System

9 Lessons

This chapter teaches you the design of a car rental system, detailing requirements, UML diagrams, and implementation code for a functional system.
16.

Designing ATM

9 Lessons

In this chapter, you will discover the design of an ATM system, focusing on requirements, use case, class, sequence, activity diagrams, and implementation code.
17.

Designing a Chess Game

8 Lessons

This chapter shows the design of a chess game, including requirements, use case, class, activity diagrams, and implementation code to develop the game.
18.

Designing a Hotel Management System

9 Lessons

This chapter covers the design of a hotel management system, detailing the requirements, UML diagrams, and implementation code for a complete system.
19.

Designing the Amazon Online Shopping System

9 Lessons

This chapter teaches you the design of the Amazon online shopping system, focusing on requirements, UML diagrams, and implementation code.
20.

Designing Stack Overflow

9 Lessons

In this chapter, you will learn the design of Stack Overflow, including requirements, use case, class, sequence, activity diagrams, and implementation code.
21.

Designing a Restaurant Management System

9 Lessons

This chapter explores how to design a restaurant management system, covering requirements, UML diagrams, and implementation code for the system.
22.

Designing Facebook

9 Lessons

This chapter shows the design of the Facebook system, detailing requirements, use case, class, sequence, activity diagrams, and implementation code.
23.

Designing an Online Stock Brokerage System

9 Lessons

This chapter covers the design of an online stock brokerage system, including requirements, UML diagrams, and implementation code.
24.

Designing a Jigsaw Puzzle

4 Lessons

In this chapter, you will discover the design of a jigsaw puzzle, focusing on requirements, class diagram, and implementation code for the puzzle.
25.

Designing an Airline Management System

9 Lessons

This chapter shows the design of an airline management system, detailing the requirements, UML diagrams, and implementation code for the system.
26.

Designing ESPNcricinfo

9 Lessons

This chapter covers the design of the ESPNcricinfo system, including requirements, use case, class, sequence, activity diagrams, and implementation code.
27.

Designing LinkedIn

9 Lessons

This chapter explores how to design the LinkedIn system, covering requirements, UML diagrams, and implementation code for a complete design.
28.

Wrapping Up

2 Lessons

This chapter concludes the course with valuable tips for excelling in object-oriented design interviews.

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