JavaScript is one of the most important programming languages in web development. If you want to become a Frontend Developer, Full Stack Developer, or Software Developer, you must prepare for JavaScript interview questions. Many IT companies ask JavaScript questions in interviews for web development, React, MERN stack, and full stack roles.
This guide includes basic, intermediate, and advanced JavaScript interview questions for students and beginners.
This article is useful for students searching for:
JavaScript Interview Questions, Web Development Course in Jaipur, Full Stack Course Jaipur, Coding Classes Jaipur, Best IT Institute Jaipur.
What is JavaScript?
JavaScript is a programming language used to make websites dynamic and interactive.
Used for:
- Events
- API calls
- UI interaction
- Animations
- Web applications
JavaScript is required for frontend and full stack development.
Basic JavaScript Interview Questions
What is JavaScript?
JavaScript is a scripting language used to create dynamic web pages.
Difference between var, let, const
| Keyword | Scope | Reassign | Redeclare |
|---|---|---|---|
| var | Function | Yes | Yes |
| let | Block | Yes | No |
| const | Block | No | No |
What is DOM?
DOM means Document Object Model.
It allows JavaScript to change HTML and CSS.
What is Event?
Event means user action like click, submit, hover.
What is Function?
Function is a block of code used to perform a task.
Intermediate JavaScript Questions
What is ES6?
Modern version of JavaScript.
Features:
- let / const
- Arrow function
- Classes
- Modules
- Promises
What is Arrow Function?
const add = (a,b) => a+b;
What is Promise?
Used for async work.
States:
- Pending
- Resolved
- Rejected
What is Async / Await?
Used to handle async code.
What is Closure?
Function inside function with memory.
Advanced JavaScript Questions
- What is Hoisting
- What is Callback
- What is Event Loop
- What is JSON
- What is API
- What is Local Storage
- What is Session Storage
- What is Prototype
- What is Class
- What is Module
These questions are asked in Full Stack interviews.
After JavaScript What to Learn?
After JavaScript learn:
- React
- Node JS
- MongoDB
- API
- Full Stack Development
- Real Projects
Only JavaScript is not enough for job.
Best JavaScript / Full Stack Course in Jaipur
Groot Academy Jaipur
Groot Academy is a software training institute in Jaipur providing job-oriented training in JavaScript, Web Development, and Full Stack.
Courses available:
- JavaScript Course
- Full Stack Web Development
- MERN Stack
- React JS
- Java Full Stack
- Python Full Stack
- C / C++
- Data Structures
- Internship Training
Why choose Groot Academy
- Live project training
- Internship certificate
- Placement support
- Industry mentors
- Beginner to advanced training
- Software company environment
Website
https://grootacademy.com
Software Company
https://grootsoftware.com
Social Media
LinkedIn
https://www.linkedin.com/company/grootacademy/?originalSubdomain=in
Instagram
https://www.instagram.com/groot.academy/
Facebook
https://www.facebook.com/GrootAcademy
Contact
+91-9610967825
Location
Jaipur Rajasthan
Final Conclusion
JavaScript interview questions are very important for students preparing for web development and full stack jobs. You should learn basics, ES6, async, API, and real projects to crack interviews.
If you are searching for JavaScript Course in Jaipur, you can join Groot Academy Jaipur, where students learn real software development with live projects, internship, and placement support.
