ES6 Interview Questions
Master ECMAScript 2015 (ES6) with our comprehensive collection of interview questions, detailed explanations, and practical code examples. Perfect for developers preparing for JavaScript technical interviews.
ES6 FeaturesArrow FunctionsDestructuringPromisesModulesClasses
📚 Table of Contents
Navigate through 11 ES6 interview questions organized by topic
Variable Declarations
2 questions
- Var, Let & Const variables
- Constructor Functions
Arrow Functions
2 questions
- This Keyword
- Arrow Functions
Destructuring
1 question
- Destructuring
Spread & Rest
1 question
- Rest vs Spread Operators
Promises & Async
3 questions
- Promises
- Promise Methods
- Async/Await
Classes & Objects
3 questions
- First-Class Functions
- Constructor Functions
- What is the purpose of the Buffer class in Node.js?
What is ES6 (ECMAScript 2015)?
ES6, also known as ECMAScript 2015, was a major update to JavaScript that introduced many new features and syntax improvements. Released in June 2015, it marked the biggest change to JavaScript since ES5 in 2009.
🚀 Key ES6 Features
Variable Declarations
- •
let- Block-scoped variables - •
const- Constants and immutable bindings - • Temporal Dead Zone (TDZ)
Functions
- • Arrow functions (
=>) - • Default parameters
- • Rest parameters (
...args)
Objects & Arrays
- • Destructuring assignment
- • Spread operator (
...) - • Enhanced object literals
Async Programming
- • Promises
- • Template literals
- • Symbols
ES5 vs ES6: Key Differences
| Feature | ES5 | ES6 |
|---|---|---|
| Variable Declaration | var only | let, const |
| Functions | function() | () => {} |
| String Concatenation | 'Hello ' + name | `Hello ${name}` |
| Object Properties | { name: name } | { name } |
| Modules | CommonJS, AMD | import/export |
ES6 Interview Questions
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💡 ES6 Interview Preparation Tips
🎯 Focus Areas
- ✓Master arrow functions and their
thisbinding - ✓Understand destructuring patterns for objects and arrays
- ✓Practice Promise chains and async/await patterns
- ✓Know the differences between
let,const, andvar
🚀 Practice Strategy
- →Code examples for each ES6 feature
- →Compare ES5 vs ES6 implementations
- →Understand browser compatibility and transpilation
- →Practice refactoring ES5 code to ES6
🔗 Related Interview Topics
Ready to Master ES6?
Start practicing with our comprehensive collection of ES6 interview questions. Each question includes detailed explanations and code examples to help you succeed.