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Low Level Design Interview (All Topics in Details)

Posted on March 23, 2024March 23, 2024 By thecodepathshala No Comments on Low Level Design Interview (All Topics in Details)

Cornerstones of Object-oriented Programming

  • Background of Object-oriented Programming (OOP)
    • Encapsulation
    • Abstraction
    • Inheritance
    • Polymorphism

Object-oriented Design

  • 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

Object-oriented Design Principles

  • 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

Design Patterns

  • Introduction to the Design Patterns
  • Classification of Design Patterns
    • Creational Design Patterns
    • Structural Design Patterns
    • Behavioral Design Patterns

Designing a Parking Lot

  • Getting Ready: Parking Lot
    • Requirements for the Parking Lot Design
    • Use Case Diagram for the Parking Lot
    • Class Diagram for the Parking Lot
    • Sequence Diagram for the Parking Lot
    • Activity Diagram for the Parking Lot
    • Code for the Parking Lot

Designing an Elevator System

  • Getting Ready: Elevator System
    • Requirements for the Elevator System
    • Use Case Diagram for the Elevator System
    • Class Diagram for the Elevator System
    • Sequence Diagram for the Elevator System
    • Activity Diagram for the Elevator System
    • Code of Elevator System

Designing a Library Management System

  • Getting Ready: Library Management System
    • Requirements for the Library Management System
    • Use Case Diagram for the Library Management System
    • Class Diagram for the Library Management System
    • Sequence Diagram for the Library Management System
    • Activity Diagram for the Library Management System
    • Code of Library Management System

Designing the Amazon Locker Service

  • Getting Ready: Amazon Locker Service
    • Requirements for the Amazon Locker Service
    • Use Case Diagram for the Amazon Locker Service
    • Class Diagram for the Amazon Locker Service
    • Sequence Diagram for the Amazon Locker Service
    • Activity Diagram for the Amazon Locker Service
    • Code for the Amazon Locker Service

Designing a Vending Machine

  • Getting Ready: Vending Machine
    • Requirements for the Vending Machine
    • Use Case Diagram for the Vending Machine
    • Class Diagram for the Vending Machine
    • Activity Diagram for the Vending Machine
    • Code for the Vending Machine

Designing an Online Blackjack Game

  • Getting Ready: Online Blackjack Game
    • Requirements for the Online Blackjack Game
    • Use Case Diagram for the Online Blackjack Game
    • Class Diagram for the Online Blackjack Game
    • Activity Diagram for the Online Blackjack Game
    • Code for the Online Blackjack Game

Designing a Meeting Scheduler

  • Getting Ready: The Meeting Scheduler Problem
    • Requirements for the Meeting Scheduler
    • Use Case Diagram for the Meeting Scheduler
    • Class Diagram for the Meeting Scheduler
    • Sequence Diagram for the Meeting Scheduler
    • Activity Diagram for the Meeting Scheduler
    • Code for the Meeting Scheduler

Designing a Movie Ticket Booking System

  • Getting Ready: Movie Ticket Booking System
    • Requirements for the Movie Ticket Booking System
    • Use Case Diagram for the Movie Ticket Booking System
    • Class Diagram for the Movie Ticket Booking System
    • Sequence Diagram for the Movie Ticket Booking System
    • Activity Diagram for the Movie Ticket Booking System
    • Code for the Movie Ticket Booking System

Designing a Car Rental System

  • Getting Ready: The Car Rental System
    • Requirements for the Car Rental System
    • Use Case Diagram for the Car Rental System
    • Class Diagram for the Car Rental System
    • Sequence Diagram for the Car Rental System
    • Activity Diagram for the Car Rental System
    • Code for the Car Rental System

Designing ATM

  • Getting Ready: The ATM System
    • Requirements for the ATM System
    • Use Case Diagram for the ATM System
    • Class Diagram for the ATM System
    • Sequence Diagram for the ATM System
    • Activity Diagram for the ATM System
    • Code for the ATM System

Designing a Chess Game

  • Getting Ready: The Chess Game
    • Requirements for the Chess Game
    • Use Case Diagram for the Chess Game
    • Class Diagram for the Chess Game
    • Activity Diagram for the Chess Game
    • Code for the Chess Game

Designing a Hotel Management System

  • Getting Ready: The Hotel Management System
    • Requirements for the Hotel Management System
    • Use Case Diagram for the Hotel Management System
    • Class Diagram for the Hotel Management System
    • Sequence Diagram for the Hotel Management System
    • Activity Diagram for the Hotel Management System
    • Code for the Hotel Management System

Designing the Amazon Online Shopping System

  • Getting Ready: The Amazon Online Shopping System
    • Requirements for the Amazon Online Shopping System
    • Use Case Diagram for the Amazon Online Shopping System
    • Class Diagram for the Amazon Online Shopping System
    • Sequence Diagram for the Amazon Online Shopping System
    • Activity Diagram for the Amazon Online Shopping System
    • Code for the Amazon Online Shopping System

Designing Stack Overflow

  • Getting Ready: Stack Overflow
    • Requirements for Stack Overflow
    • Use Case Diagram for Stack Overflow
    • Class Diagram for Stack Overflow
    • Sequence Diagram for Stack Overflow
    • Activity Diagram for Stack Overflow
    • Code for Stack Overflow

Designing a Restaurant Management System

  • Getting Ready: The Restaurant Management System
    • Requirements for the Restaurant Management System
    • Use Case Diagram for the Restaurant Management System
    • Class diagram for the Restaurant Management System
    • Sequence Diagram for the Restaurant Management System
    • Activity Diagram for the Restaurant Management System
    • Code for the Restaurant Management System

Designing Facebook

  • Getting Ready: The Facebook System
    • Requirements for Facebook
    • Use Case Diagram for Facebook
    • Class Diagram for Facebook
    • Sequence Diagram for Facebook
    • Activity Diagram for Facebook
    • Code for Facebook

Designing an Online Stock Brokerage System

  • Getting Ready: An Online Stock Brokerage System
    • Requirements for the Online Stock Brokerage System
    • Use Case Diagram for the Online Stock Brokerage System
    • Class Diagram for the Online Stock Brokerage System
    • Sequence Diagram for the Online Stock Brokerage System
    • Activity Diagram for the Online Stock Brokerage System
    • Code for the Online Stock Brokerage System

Designing a Jigsaw Puzzle

  • Getting Ready: Jigsaw Puzzle
    • Requirements for the Jigsaw Puzzle
    • Class Diagram for the Jigsaw Puzzle
    • Code of Jigsaw Puzzle

Designing an Airline Management System

  • Getting Ready: The Airline Management System
    • Requirements for the Airline Management System
    • Use Case Diagram for the Airline Management System
    • Class Diagram for the Airline Management System
    • Sequence Diagram for the Airline Management System
    • Activity Diagram for the Airline Management System
    • Code for the Airline Management System

Designing Cricinfo

  • Getting Ready: The Cricinfo System
    • Requirements for Cricinfo
    • Use Case Diagram for Cricinfo
    • Class Diagram for Cricinfo
    • Sequence Diagram for Cricinfo
    • Activity Diagram for Cricinfo
    • Code for Cricinfo

Designing LinkedIn

  • Getting Ready: The LinkedIn System
    • Requirements for LinkedIn
    • Use Case Diagram for LinkedIn
    • Class Diagram for LinkedIn
    • Sequence Diagram for LinkedIn
    • Activity Diagram for LinkedIn
    • Code for LinkedIn

LLD, Low-level design, System Design Tags:LLD, Low-level design, system design

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Types of Queue (Simple, Circular, Priority, Deque)

Time Complexity of Queue Operations

Enqueue → O(1)

Dequeue → O(1)

Front / Peek → O(1)

Rear → O(1)

Search → O(n)

Space Complexity of Queue

Queue Implementation (Array vs Linked List)

Real-World Applications of Queue

Most Asked Queue Interview Questions

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Want to master Time Complexity and Space Complexity of Stack for DSA and coding interviews? 🤔
In this video, we explain Stack Data Structure Complexity using simple examples, Big-O notation, and interview-oriented explanations.

🚀 What You’ll Learn in This Video:

What is a Stack in Data Structures?

Stack Principle: LIFO (Last In First Out)

Time Complexity of Stack Operations

Push → O(1)

Pop → O(1)

Peek / Top → O(1)

Search → O(n)

Space Complexity of Stack

Stack Implementation (Array vs Linked List)

Real-World Applications of Stack

Common Stack Interview Questions

🎯 Why Watch This Video?
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DSA Beginners

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🔥 Time & Space Complexity of Stack | Stack Data Structure | Big-O Explained
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