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+# JavaScript & TypeScript Interview Guide (In Progress)
+
+Welcome to the **JavaScript & TypeScript Interview Guide**! This repository is curated to assist developers in preparing for interviews by covering core concepts, coding challenges, design patterns, and system design principles.
+
+## Table of Contents
+
+1. [JavaScript & TypeScript Core Concepts](#1-javascript--typescript-core-concepts)
+2. [Beginner Pattern Problems](#2-beginner-pattern-problems)
+3. [Machine Round & Polyfills](#3-machine-round--polyfills)
+4. [Data Structures](#4-data-structures)
+5. [Low-Level Design (LLD)](#5-low-level-design-lld)
+6. [High-Level Design (HLD)](#6-high-level-design-hld)
+
+<br>
+
+
+## 1. JavaScript & TypeScript Core Concepts
+
+**Folder:** `01 - JavaScript & TypeScript Core Concepts`
+
+This section delves into fundamental concepts essential for mastering JavaScript and TypeScript.
+
+<details>
+  <summary>JavaScript Core Concepts</summary>
+
+  - [Closures](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/JavaScript%20Closures.md)
+  - [Currying](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/JavaScript%20Currying.md)
+  - [Generators](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/JavaScript%20Generators.md)
+  - [Hoisting](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/JavaScript%20Hoisting.md)
+  - [Iterators & Iterables](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/JavaScript%20Iterators%20&%20Iterables.md)
+  - [NaN](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/JavaScript%20NaN.md)
+  - [Rest vs Spread Operator](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/JavaScript%20Rest%20vs%20Spread%20Operator.md)
+  - [Scope](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/JavaScript%20Scope.md)
+  - [Undefined vs Null](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/JavaScript%20Undefined%20vs%20Null.md)
+  - [Automatic Semicolon Insertion](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/JavaScript%20Automatic%20Semicolon%20Insertion.md)
+</details>
+<details>
+  <summary>TypeScript Core Concepts</summary>
+
+  - [TypeScript Types](01%20-%20JavaScript%20&%20TypeScript%20Core%20Concepts/TypeScript%20Types.md)
+</details>
+
+<br>
+
+## 2. Beginner Pattern Problems
+
+**Folder:** `02 - Beginner Pattern Problems`
+
+Enhance your problem-solving skills with these pattern-based challenges.
+
+- [Basic Star Patterns](02%20-%20Beginner%20Pattern%20Problems/Basic%20Star%20Patterns.md)
+- [Number Patterns](02%20-%20Beginner%20Pattern%20Problems/Number%20Patterns.md)
+- [Alphanumeric Patterns](02%20-%20Beginner%20Pattern%20Problems/Alphanumeric%20Patterns.md)
+- [Advanced Pattern Questions](02%20-%20Beginner%20Pattern%20Problems/Advanced%20Pattern%20Questions.md)
+
+<br>
+
+## 3. Machine Round & Polyfills
+
+**Folder:** `03 - Machine Round & Polyfills`
+
+Prepare for machine coding rounds with these practical problems and polyfill implementations.
+
+- [Polyfills for JavaScript](03%20-%20Machine%20Round%20&%20Polyfills/Polyfills%20for%20JavaScript.md)
+- [Custom Implementation of Map, Filter, and Reduce](03%20-%20Machine%20Round%20&%20Polyfills/Custom%20Implementation%20of%20Map%2C%20Filter%2C%20and%20Reduce.md)
+- [Debounce and Throttle](03%20-%20Machine%20Round%20&%20Polyfills/Debounce%20and%20Throttle.md)
+- [Deep Copy vs Shallow Copy](03%20-%20Machine%20Round%20&%20Polyfills/Deep%20Copy%20vs%20Shallow%20Copy.md)
+- [Event Delegation](03%20-%20Machine%20Round%20&%20Polyfills/Event%20Delegation.md)
+- [Memoization Techniques](03%20-%20Machine%20Round%20&%20Polyfills/Memoization%20Techniques.md)
+- [Promise.all & Async/Await](03%20-%20Machine%20Round%20&%20Polyfills/Promise.all%20&%20Async%20Await.md)
+
+<br>
+
+## 4. Data Structures
+
+**Folder:** `04 - Data Structures`
+
+Explore problems focused on various data structures.
+
+- [Arrays](04%20-%20Data%20Structures/Arrays.md)
+- [Linked Lists](04%20-%20Data%20Structures/Linked%20Lists.md)
+- [Stacks](04%20-%20Data%20Structures/Stacks.md)
+- [Queues](04%20-%20Data%20Structures/Queues.md)
+- [Trees](04%20-%20Data%20Structures/Trees.md)
+- [Graphs](04%20-%20Data%20Structures/Graphs.md)
+- [Hash Maps](04%20-%20Data%20Structures/Hash%20Maps.md)
+- [Sorting Algorithms](04%20-%20Data%20Structures/Sorting%20Algorithms.md)
+- [Searching Algorithms](04%20-%20Data%20Structures/Searching%20Algorithms.md)
+
+<br>
+
+## 5. Low-Level Design (LLD)
+
+**Folder:** `05 - Low-Level Design`
+
+Understand system design principles and implement design patterns.
+
+### TypeScript Design Patterns
+
+- **Behavioral Design Patterns**
+  - [Chain of Responsibility (Logging System)](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Behavioral%20Design%20Patterns/Chain%20of%20Responsibility%20(Logging%20System).md)
+  - [Observer Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Behavioral%20Design%20Patterns/Observer%20Pattern.md)
+  - [Strategy Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Behavioral%20Design%20Design%20Patterns/Strategy%20Pattern.md)
+  - [State Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Behavioral%20Design%20Patterns/State%20Pattern.md)
+  - [Command Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Behavioral%20Design%20Patterns/Command%20Pattern.md)
+  - [Iterator Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Behavioral%20Design%20Patterns/Iterator%20Pattern.md)
+  - [Mediator Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Behavioral%20Design%20Patterns/Mediator%20Pattern.md)
+  - [Memento Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Behavioral%20Design%20Patterns/Memento%20Pattern.md)
+  - [Template Method Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Behavioral%20Design%20Patterns/Template%20Method%20Pattern.md)
+  - [Visitor Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Behavioral%20Design%20Patterns/Visitor%20Pattern.md)
+
+- **Creational Design Patterns**
+  - [Abstract Factory Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Creational%20Design%20Patterns/Abstract%20Factory%20Pattern.md)
+  - [Builder Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Creational%20Design%20Patterns/Builder%20Pattern.md)
+  - [Factory Method Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Creational%20Design%20Patterns/Factory%20Method%20Pattern.md)
+  - [Prototype Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Creational%20Design%20Patterns/Prototype%20Pattern.md)
+  - [Singleton Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Creational%20Design%20Patterns/Singleton%20Pattern.md)
+
+- **Structural Design Patterns**
+  - [Adapter Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Structural%20Design%20Patterns/Adapter%20Pattern.md)
+  - [Bridge Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Structural%20Design%20Patterns/Bridge%20Pattern.md)
+  - [Composite Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Structural%20Design%20Patterns/Composite%20Pattern.md)
+  - [Decorator Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Structural%20Design%20Patterns/Decorator%20Pattern.md)
+  - [Facade Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Structural%20Design%20Patterns/Facade%20Pattern.md)
+  - [Flyweight Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Structural%20Design%20Patterns/Flyweight%20Pattern.md)
+  - [Proxy Pattern](05%20-%20Low-Level%20Design/TypeScript%20Design%20Patterns/Structural%20Design%20Patterns/Proxy%20Pattern.md)
+
+