Grokking the Low Level Design Interview Using OOD Principles

This course will help you master object-oriented Design principles, which can be used to answer the questions asked during object-oriented Design interviews.

Intermediate

173 Lessons

50h

Certificate of Completion

This course will help you master object-oriented Design principles, which can be used to answer the questions asked during object-oriented Design interviews.

AI-POWERED

Code Feedback

Mock Interview

Explanations

Prompt

AI-POWERED

Code Feedback

Mock Interview

This course includes

21 AI Prompts

21 AI Feedbacks

8 Playgrounds

8 Quizzes

This course includes

21 AI Prompts

21 AI Feedbacks

8 Playgrounds

8 Quizzes

Course Overview

With hundreds of potential problems to design, preparing for the object-oriented design (OOD) interview can feel like a daunting task. However, with a strategic approach, OOD interview prep doesn’t have to take more than a few weeks. In this course, you’ll learn the fundamentals of object-oriented design with an extensive set of real-world problems to help you prepare for the OOD part of a typical software engineering interview process at major tech companies like Apple, Google, Meta, Microsoft, and Amazo...Show More

TAKEAWAY SKILLS

Java

Software Engineering

Prepare For Interview

Object Oriented Design

What You'll Learn

An understanding of the essential object-oriented concepts like design principles and patterns to ace the OOD interview

The ability to efficiently breakdown an interview design problem into multiple parts using a bottom-up approach

Familiarity with the scope of each interview problem by accurately defining the requirements and presenting its solution

Learn to design class, use case, sequence and activity diagrams of the interview problems

Hands-on experience to create sequence and activity diagrams for the interview problems

Explore the implementation code of each designed problem using multiple programming languages (Java, C++, C#, Python, and JavaScript)

What You'll Learn

An understanding of the essential object-oriented concepts like design principles and patterns to ace the OOD interview

Course Content

Introduction

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

Overview

Introduction to the Course

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.

Background of Object-oriented Programming (OOP)Encapsulation Abstraction Inheritance Polymorphism Quiz: Object-oriented Basics

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.

Introduction to Object-oriented Analysis and Design (OOAD)Introduction to the Unified Modeling Language Types of UML Diagrams Use Case Diagram Class Diagram Sequence Diagram Activity Diagram Quiz: Object-oriented Design

Object-oriented Design Principles

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

Introduction to SOLID Design Principles SOLID: Single Responsibility Principle SOLID: Open Closed Principle SOLID: Liskov Substitution Principle SOLID: Interface Segregation Principle SOLID: Dependency Inversion Principle Quiz: Object-oriented Design Principles

Design Patterns

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

Introduction to the Design Patterns Classification of Design Patterns Creational Design Patterns Structural Design Patterns Behavioral Design Patterns Quiz: Design Patterns

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.

Designing a Parking Lot

7 Lessons

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

Designing an Elevator System

7 Lessons

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

Designing a Library Management System

7 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

7 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

6 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

6 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

7 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

7 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

7 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

7 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

6 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

7 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

7 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

7 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

7 Lessons

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

22.

Designing Facebook

7 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

7 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

7 Lessons

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

26.

Designing Cricinfo

7 Lessons

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

27.

Designing LinkedIn

7 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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Frequently Asked Questions

What is an object-oriented design interview?

An object-oriented design (OOD) interview is a specialized technical interview used to evaluate your understanding of object-oriented programming principles and your ability to apply these principles to solve design problems. Typically lasting 45-60 minutes, this interview covers the basics of object-oriented programming and more complex concepts such as design principles and patterns. This is crucial for roles at major tech companies like Apple, Google, Meta, Microsoft, and Amazon.

How to prepare for an OOD interview?

When solving OOD interview questions, be sure to ask questions to clarify any aspects of the requirements you might not fully understand. It’s important not to rush into coding right away. Take a moment to identify the key objects involved in the solution and understand their relationships at a high level. Finally, describe the attributes and behaviors of each object to ensure a comprehensive design approach.

What are the principles of Low-Level Design?

Low-Level Design (LLD) revolves around a set of key principles that guide how software components are structured to work together efficiently. The main focus of LLD is all about breaking down a system into smaller, manageable parts so that developers can build systems that are flexible, easy to debug, and can adapt to changes more effectively.

How do you answer Low-Level Design questions?

To answer a Low-Level Design (LLD) problem, understand the problem’s requirements and avoid making unfounded assumptions. Next, draw class diagrams, and use case diagrams and schema diagrams to find the data model. Once you have the structure, go ahead and write the code using design patterns, OOD, and SOLID principles. Developers can take courses to practice mock Low-Level Design questions.