✅ *Web Development Mock Interview Questions: Part-3* ⚡🌐
1️⃣ *Q: What is the difference between inline CSS, internal CSS, and external CSS?*
*A:*
• *Inline CSS* → Applied directly to an element using the `style` attribute.
• *Internal CSS* → Defined inside a `<style>` tag within the HTML `<head>`.
• *External CSS* → Stored in a separate `.css` file and linked with `<link>`.
2️⃣ *Q: What are pseudo-classes in CSS?*
*A:* Pseudo-classes define the state of an element.
Examples:
• `:hover` → When the mouse is over an element
• `:focus` → When an input is focused
• `:nth-child()` → Selects specific child elements
3️⃣ *Q: What is the difference between inline script, internal script, and external script in JavaScript?*
*A:*
• *Inline* → Written directly in an element using attributes like `onclick`
• *Internal* → Inside a `<script>` tag in HTML
• *External* → Stored in a `.js` file and linked with `<script src="">`
4️⃣ *Q: What is AJAX?*
*A:* AJAX (Asynchronous JavaScript and XML) is a technique to update parts of a web page without reloading the whole page. Uses `XMLHttpRequest` or `fetch()`.
5️⃣ *Q: What is the difference between relative, absolute, fixed, and sticky positioning in CSS?*
*A:*
• *Relative* → Positioned relative to its normal position
• *Absolute* → Positioned relative to the nearest positioned ancestor
• *Fixed* → Stays fixed on screen even while scrolling
• *Sticky* → Acts relative until a scroll threshold, then sticks
6️⃣ *Q: What are web components?*
*A:* Web Components are reusable custom elements built using:
• Custom Elements
• Shadow DOM
• HTML Templates
7️⃣ *Q: What is the difference between var, let, and const in JavaScript?*
*A:*
• *var* → Function-scoped, allows re-declaration
• *let* → Block-scoped, can be reassigned
• *const* → Block-scoped, cannot be reassigned
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