1. What skills does a front-end developer need?
2.Define HTML meta tags
3. Differentiate between div and span?
4. What is React JS?
5. Describe the advantages of REST web services?
6. How browsers render the UI?
7. What is a Grid system in CSS?
8. Describe the distinction between Class and Prototypal inheritance in Javascript?
9. Explain user-centered design?
10. What is ClickJacking?
11. Tell me when and why should I make use of Webpack?
12. Mention three ways to decrease page load time?
13. How does the server hanger the page in which content is present in several languages?
14. Why did we utilize the data- the attribute in HTML and why it is now advised not to use?
15. Mention the benefits of CoffeeScript over JavaScript?
16. What is stringify?
17. State all the elements of the CSS Box Model.
18.What is Mixin?
19.What is Progressive Rendering?
20. Mention the difference between MySQL and MongoDB?
21.Define the Anonymous function inJS?
22.What do you know about the CSS image sprites and why it is utilized?
23.Suggest some ways on how to fix the browser-specific styling issue?
24. Mention the pitfalls for using a CSS preprocessor like Sass
25. Define the Anonymous function in JS
26.What do you know about the CSS image sprites and why it is utilized?
27.Mention the pitfalls for using a CSS Preprocessor like Sass?
28.Suggest how can we optimize our front-end page.
29.What is the difference between attribute and property?
30. State the difference between == and ===?
31.Why do we utilize the “use strict”; statement?
32.Name the major HTTP requests
33.How do I prepare for a front-end developer interview?
34.Why should we hire you as frontend developer?
35.What is the most challenging work you have ever done as a front-end developer?
36. How much do front end developers get paid?
37. Is front end developer a good career?
38.What is front end and back end web development?
39.Which language is best for front end development?
40.Adding the style attributes in HTML elements is regarded to be?
41.Which attribute is utilised to link the bookmark?
42.A TARGET value that is utilized when a webpage is locked in a frame, is called?
43.During styling, making use of a <style> element in the head section is called?
44.In HTML elements, CSS can be added in how many ways
45.Is it right to pass an unknown function as an argument to another function?
46.What is the purpose of an Array object that removes or adds elements from an array?
47.Which of the following processes clears the last element from an array and returns that element?
48.Which function of the Number object would show output in exponential format?
49.Which String object functions return the capitalized string while respecting the current locale?
50.What are some most used Git Commands and functions?
51.What do you understand by Version Control System?
Front-End Developer Interview Questions And Answers
- Skills of a Front-End Developer
Ans.
- Proficiency in HTML, CSS, and JavaScript.
- Knowledge of CSS preprocessors like Sass or Less.
- Experience with front-end frameworks like React, Angular, or Vue.
- Responsive and mobile design skills.
- Version control using systems like Git.
- Understanding of browser developer tools.
- Basic graphic design skills and knowledge of design tools.
- Cross-browser development and testing.
- Web performance optimization.
2.HTML Meta Tags:
Ans.
- HTML meta tags provide metadata about the HTML document.
- They are placed within the
<head>section of an HTML document. - Common meta tags include:
<meta charset="UTF-8">: Specifies the character set for the document.<meta name="viewport" content="width=device-width, initial-scale=1.0">: Configures the viewport for responsive design.<meta name="description" content="A brief description of the page">: Provides a description for search engines.
3.Difference between <div> and <span>:
Ans.
<div>is a block-level element used to group other HTML elements and apply styles or structure to them.<span>is an inline element used for styling specific parts of text or inline elements.<div>typically starts on a new line and takes up the full width available, while<span>stays within the flow of the surrounding content.
4.React JS:
Ans.
- React is a JavaScript library for building user interfaces.
- Developed by Facebook, React allows developers to create reusable UI components.
- It uses a virtual DOM for efficient rendering and updates only the necessary parts of the actual DOM.
- React follows a unidirectional data flow and supports a declarative syntax for defining UI components.
5.Advantages of REST Web Services:
Ans.
- Simplicity and scalability.
- Stateless communication.
- Wide adoption and compatibility with various programming languages.
- Resources are identified by URLs.
- Supports multiple data formats, including JSON and XML.
- Easy to cache responses for better performance.
6.How Browsers Render UI:
Ans.
- Browsers parse HTML and construct the Document Object Model (DOM).
- CSS is applied to the DOM, creating the Render Tree.
- Layout involves determining the position and size of each element.
- The Render Tree is painted to the screen.
- JavaScript can manipulate the DOM and trigger reflows or repaints.
7.Grid System in CSS:
Ans.
- A grid system in CSS is a layout system that allows for a grid-based structure in web design.
- It consists of columns and rows that make it easier to design responsive and consistent layouts.
- Popular grid systems include Bootstrap Grid, CSS Grid Layout, and Flexbox.
8.Class vs. Prototypal Inheritance in JavaScript:
Ans.
- Class Inheritance: Introduced in ES6, it allows for creating classes and extends relationships between them. It provides a more familiar syntax for developers coming from other object-oriented languages.
- Prototypal Inheritance: In JavaScript, objects inherit from other objects directly. Each object has a prototype object, and if a property is not found on the object itself, it looks up the prototype chain until it finds the property or reaches the end.
- User-Centered Design:
Ans.
- Definition: User-Centered Design (UCD) is an iterative design process that focuses on the needs and experiences of the end user. It involves users throughout the design and development process to ensure that the final product meets their expectations and requirements.
- Key Principles:
- User Involvement: Actively involve users in the design process through techniques like user testing, interviews, and feedback sessions.
- Iterative Design: Continuously refine and improve the design based on user feedback and testing.
- Usability: Prioritize the usability of the product, ensuring it is easy to use and understand for the target audience.
- Accessibility: Consider the diverse needs and abilities of users, including those with disabilities, to create an inclusive design.
10.Clickjacking:
Ans.
- Definition: Clickjacking, also known as a UI (User Interface) redress attack, is a malicious technique where an attacker tricks a user into clicking on something different from what the user perceives. The attacker overlays or disguises one website element over another, leading the user to unintentionally perform actions without their knowledge.
- How it Works: The attacker often uses iframes or transparent layers to cover an innocuous-looking element (like a button) on a website with a malicious element. When the user clicks what they see, they are actually interacting with the hidden, malicious element.
- Prevention: To prevent clickjacking, web developers can use techniques like frame-busting scripts, X-Frame-Options HTTP header, and ensuring that their web applications cannot be embedded within iframes on other domains without permission. Users can also protect themselves by being cautious about clicking on unfamiliar or unexpected elements on web pages.
Hello, I’m Hridhya Manoj. I’m passionate about technology and its ever-evolving landscape. With a deep love for writing and a curious mind, I enjoy translating complex concepts into understandable, engaging content. Let’s explore the world of tech together