Скачать или смотреть Front End Developer Interview Questions and Answers

In this video Faisal Nadeem shared 10 most important front end developer interview questions and answers.

Q1) What are the key responsibilities of a front-end developer?
Answer: A front-end developer designs and implements the visual and interactive elements of a website or app, ensuring responsiveness, usability, and performance.

Q2) What are HTML, CSS, and JavaScript used for?
Answer: HTML structures content, CSS styles it, and JavaScript adds interactivity and dynamic behavior to web pages.

Q3) What is the difference between classes and IDs in CSS?
Answer: IDs are unique and used once per page, while classes can be reused for styling multiple elements.

Q4) What is the DOM?
Answer: The Document Object Model (DOM) represents the structure of a webpage as a tree of objects that JavaScript can manipulate.

Q5) What are some common frameworks and libraries used in front-end development?
Answer: Popular ones include React, Angular, Vue.js, jQuery, Bootstrap, and Tailwind CSS.

Q6) What is responsive design?
Answer: Responsive design ensures a website looks and works well on all devices, from desktops to smartphones, using flexible layouts and media queries.

Q7) How do you improve website performance?
Answer: By optimizing images, minimizing CSS/JS, using lazy loading, caching, and reducing HTTP requests.

Q8) What are semantic HTML elements?
Answer: Semantic elements like header, footer, and article clearly describe their meaning and improve accessibility and SEO.

Q9) What is the difference between == and === in JavaScript?
Answer: == compares values with type conversion, while === compares both value and type exactly.

Q10) How do you manage cross-browser compatibility issues?
Answer: I use modern frameworks, test in multiple browsers, write clean, standards-based code, and apply fallbacks or polyfills when needed.

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