`` is a block-level element used for grouping content.
`` is an inline element used to style small parts of text.



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5. What is the difference between absolute, relative, and self-closing tags?
Absolute Tags: Need both an opening and closing tag. Example: ``.
Relative Tags: Depend on other elements, like `` inside ``.
Self-closing Tags: Do not require a closing tag. Example: `, ,,`.



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6. What is the difference between  and  tags?
`` is used to connect external CSS files.
`` is used to include JavaScript code.



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7. What is the Use of the  Tag?The  tag provides important information about a webpage to browsers and search engines. This information is called metadata (data about data).It helps in:
Helps search engines understand the page.
Improves SEO (Search Engine Optimization).
Controls how the page behaves on different devices.
Helps browsers load the page correctly.

  
  
  CSS:
1. What are the different types of CSS?
Inline CSS – Applied directly within an HTML tag.
Hello
Internal CSS – Defined inside a  tag.


<style> p { color: blue; } </style>


External CSS – Written in a separate .css file and links that file to html file.


<link rel="stylesheet" href="style.css">

Priority hierarchy:


External CSS ()
Internal CSS (...)
Inline CSS (style="...") (Highest normal priority)


2. What is the difference between id and class in CSS?


id: Unique identifier, applied to a single element.


#header { color: red; }


class: Can be used for multiple elements.


.button { background: blue; }

Note:
--> ID has higher priority than Class.
--> If both ID and Class are applied, the ID styles will override class styles.

3. What do you mean by css selectors?Name a few.

CSS selectors are used to target and style specific elements in HTML.

1️) Universal Selector (*) → Selects all elements.
2️) Element Selector (tag) → Selects all elements of a specific type (e.g., all  or ).
3️) Class Selector (.class) → Selects all elements with a specific class.
4️) ID Selector (#id) → Selects a unique element with a specific ID.

4. What is Flexbox in CSS?

Flexbox is a layout model used for aligning elements efficiently.


justify-content: Aligns items horizontally.
align-items: Aligns items vertically.


5. How do you make a website responsive?


    Use media queries (@media).
    Use relative units (%, em, rem, vw, vh).
    Use Flexbox or Grid Layout.


  
  
  Javascript


1. What is JavaScript?

--> JavaScript (JS) is a high-level, interpreted programming language that enables developers to create dynamic and interactive web applications.
--> It is a core technology of the web, alongside HTML (structure) and CSS (styling).
--> Originally designed for client-side scripting, JavaScript has evolved to support server-side programming with Node.js. 
--> It is widely used in web development, game development, mobile apps, and more.

2. What is the difference between let, const, and var?
var: Function-scoped, can be redeclared.
let: Block-scoped, cannot be redeclared.
const: Block-scoped, cannot be reassigned.
Example:
var x = 10;  // Function scope
let y = 20;  // Block scope
const z = 30; // Constant value
3. What are arrow functions in JavaScript?--> Arrow functions in JavaScript are also called anonymous functions because they do not have a name.
--> They are mainly used for short-term tasks, like callbacks. They are simpler to write and use the => symbol to define a function. 
--> Arrow functions do not have their own this or arguments object. --> If the function has only one statement, it automatically returns the result without needing the return keyword.Ex:
const sum = (a, b) => a + b;
console.log(sum(5, 10)); // 15
4. What is the difference between == and ===?==: Compares values (type conversion allowed).
===: Compares values and types (strict comparison).
Ex:
console.log(5 == "5");  // true
console.log(5 === "5"); // false
5. What is the difference between null and undefined?
null: Assigned value representing "no value".
undefined: Variable declared but not assigned a value.
Ex:
let a = null;
let b;
console.log(a); // null
console.log(b); // undefined