17 common questions for Front End Developer Cfor Freshers and Experience

Overview

This article presents a compilation of common interview questions for front-end developer positions, targeting both entry-level and experienced professionals. The questions span a range of topics critical to front-end development, designed to assess a candidate's understanding of fundamental concepts and practical application.

Interview Rounds

While the exact structure of front-end developer interviews can vary, the questions outlined in this resource generally align with technical interview rounds. The questions are categorized to reflect the breadth of knowledge expected from front-end developers:

Frontend Developer Interview Questions for Freshers

• What are meta tags in HTML?
• What is the purpose of a DOCTYPE declaration in HTML?
• What does "npm" stand for, and what is its use?
• What is the scope of JavaScript?
• How is JavaScript different from jQuery?
• What is a Content Security Policy (CSP)?
• What is Cross-Site Scripting (XSS)?
• Explain the concept of polymorphism.
• What is "Strict Mode" in JavaScript?
• List some methods to decrease page load time.
• What is "callback hell," and how can it be avoided?
• What does "SOLID" stand for in programming?
• What is the grid system in CSS?
• Mention some basic design elements in front-end development.
• What is the DOM (Document Object Model)?
• What is HTML5 Web Storage? Explain its types.
• What is User-Centered Design (UCD)?

Frontend Developer Interview Questions for Experienced Candidates

1. What is WebP, and why is it used?
2. Why should we use HTML5 semantic tags?
3. What is an HTML preprocessor, and are you using one?
4. What is progressive rendering in web development?
5. Explain the concept of Web Components.
6. What is IndexedDB, and when would you use it?
7. How can you generate a public key in an HTML application?
8. When would you choose SVG over Canvas for your site, and why?
9. What is the difference between Full Standard Mode, Almost Standard Mode, and Quirks Mode?
10. Differentiate between block elements and inline elements in HTML.
11. What is accessibility in web development, and what does ARIA mean?
12. How can you check the validity of your HTML markup?
13. What is "Stringify" in JavaScript, and when is it used?
14. Explain the elements of the CSS Box Model.
15. What is the benefit of using the "srcset" attribute in images?
16. What are critical CSS and lazy loading, and how do they improve performance?
17. How would you optimize a website for mobile devices and improve its responsiveness?

Key Takeaways

The presented questions serve as a valuable resource for front-end developers preparing for interviews. Reviewing these topics can help candidates solidify their understanding of core concepts and improve their ability to articulate solutions to common front-end development challenges. The questions cover a spectrum of essential knowledge, from fundamental HTML principles to advanced performance optimization techniques.