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ADMIN : @Coding_Master 👨🏼‍💼 Hello guys, I Created This Telegram Channel To Share Useful Content On Web Development & Programming. 👉 Free Ebooks 👉 Free Tools & Resources Links 👉 Free Projects Source Code So Stay Tuned With Us & Keep Learning 😉

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Most Asked HTML & CSS Interview Questions for Freshers 🤩 Must Watch 👇 https://youtu.be/cRm9dQguVdw?si=hd6pb2y5sRtdnten

Don't overwhelm to learn JavaScript, JavaScript is only this much 1.Variables • var • let • const 2. Data Types • number • string • boolean • null • undefined • symbol 3.Declaring variables • var • let • const 4.Expressions Primary expressions • this • Literals • [] • {} • function • class • function* • async function • async function* • /ab+c/i • string • ( ) Left-hand-side expressions • Property accessors • ?. • new • new .target • import.meta • super • import() 5.operators • Arithmetic Operators: +, -, *, /, % • Comparison Operators: ==, ===, !=, !==, <, >, <=, >= • Logical Operators: &&, ||, ! 6.Control Structures • if • else if • else • switch • case • default 7.Iterations/Loop • do...while • for • for...in • for...of • for await...of • while 8.Functions • Arrow Functions • Default parameters • Rest parameters • arguments • Method definitions • getter • setter 9.Objects and Arrays • Object Literal: { key: value } • Array Literal: [element1, element2, ...] • Object Methods and Properties • Array Methods: push(), pop(), shift(), unshift(), splice(), slice(), forEach(), map(), filter() 10.Classes and Prototypes • Class Declaration • Constructor Functions • Prototypal Inheritance • extends keyword • super keyword • Private class features • Public class fields • static • Static initialization blocks 11.Error Handling • try, • catch, • finally (exception handling) ADVANCED CONCEPTS 12.Closures • Lexical Scope • Function Scope • Closure Use Cases 13.Asynchronous JavaScript • Callback Functions • Promises • async/await Syntax • Fetch API • XMLHttpRequest 14.Modules • import and export Statements (ES6 Modules) • CommonJS Modules (require, module.exports) 15.Event Handling • Event Listeners • Event Object • Bubbling and Capturing 16.DOM Manipulation • Selecting DOM Elements • Modifying Element Properties • Creating and Appending Elements 17.Regular Expressions • Pattern Matching • RegExp Methods: test(), exec(), match(), replace() 18.Browser APIs • localStorage and sessionStorage • navigator Object • Geolocation API • Canvas API 19.Web APIs • setTimeout(), setInterval() • XMLHttpRequest • Fetch API • WebSockets 20.Functional Programming • Higher-Order Functions • map(), reduce(), filter() • Pure Functions and Immutability 21.Promises and Asynchronous Patterns • Promise Chaining • Error Handling with Promises • Async/Await 22.ES6+ Features • Template Literals • Destructuring Assignment • Rest and Spread Operators • Arrow Functions • Classes and Inheritance • Default Parameters • let, const Block Scoping 23.Browser Object Model (BOM) • window Object • history Object • location Object • navigator Object 24.Node.js Specific Concepts • require() • Node.js Modules (module.exports) • File System Module (fs) • npm (Node Package Manager) 25.Testing Frameworks • Jasmine • Mocha • Jest *React ❤️ for more*

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*10 professional-level JavaScript interview questions with answers:* *1. What is the difference between var, let, and const?* var is function-scoped and can be hoisted. let and const are block-scoped and not hoisted like var. const cannot be reassigned after declaration. var a = 10; let b = 20; const c = 30; *2. What is a closure in JavaScript?* A closure is a function that retains access to its lexical scope even after the outer function has finished executing. function outer() { let count = 0; return function inner() { count++; return count; }; } const counter = outer(); counter(); // 1 counter(); // 2 *3. How does the JavaScript event loop work?* The event loop handles async tasks by pushing them into the call stack only when it's empty. Microtasks (like Promises) are prioritized over macrotasks (like setTimeout). *4. Explain this keyword in JavaScript.* this refers to the context in which a function is called. In a method: this refers to the object. In a regular function: this refers to window (in non-strict mode). In arrow functions: this is lexically inherited. *5. What is the difference between == and ===?* == checks for value equality (type coercion). === checks for strict equality (no type coercion). '5' == 5 // true '5' === 5 // false *6. What is event delegation?* Event delegation is a technique where a single event listener is added to a parent element to handle events on its child elements. document.getElementById("list").addEventListener("click", function(e) { if (e.target.tagName === "LI") { console.log("List item clicked:", e.target.textContent); } }); *7. What is the difference between null and undefined?* undefined: a variable declared but not assigned a value. null: an assignment value representing no value. let a; console.log(a); // undefined let b = null; console.log(b); // null *8. What is a Promise and how do async/await work?* A Promise represents the eventual result of an asynchronous operation. async/await make asynchronous code look synchronous. async function getData() { let result = await fetch('https://api.example.com'); let data = await result.json(); console.log(data); } *9. What is prototypal inheritance?* JavaScript objects inherit properties and methods from a prototype object. function Person(name) { this.name = name; } Person.prototype.sayHi = function() { return Hi, I'm ${this.name}; }; *10. What is debouncing in JavaScript?* Debouncing limits the rate at which a function is executed, waiting for a pause in activity. function debounce(fn, delay) { let timer; return function(...args) { clearTimeout(timer); timer = setTimeout(() => fn.apply(this, args), delay); }; } *React ❤️ for more*

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Master Java Programming.pdf1.51 MB

*Typical C++ interview questions sorted by experience* Junior: - What are the key features of object-oriented programming in C++? - Explain the differences between public, private, and protected access specifiers in C++. - Distinguish between function overloading and overriding in C++. - Compare and contrast abstract classes and interfaces in C++. - Can an interface inherit from another interface in C++? - Define the static keyword in C++ and its significance. - Is it possible to override a static method in C++? - Explain the concepts of polymorphism and inheritance in C++. - Can constructors be inherited in C++? - Discuss pass-by-reference and pass-by-value for objects in C++. - Compare == and .equals for string comparison in C++. - Explain the purposes of the hashCode() and equals() functions. - What does the Serializable interface do? How is it related to Parcelable in Android? - Differentiate between Array and ArrayList in C++. When would you use each? - Explain the distinction between Integer and int in C++. - Define ThreadPool and discuss its advantages over using simple threads. - Differentiate between local, instance, and class variables in C++. Mid: - What is reflection in C++? - Define dependency injection and name a few libraries. Have you used any? - Explain strong, soft, and weak references in C++. - Interpret the meaning of the synchronized keyword. - Can memory leaks occur in C++? - Is it necessary to set references to null in C++? - Why is a String considered immutable? - Discuss transient and volatile modifiers in C++. - What is the purpose of the finalize() method? - How does the try{} finally{} block work in C++? - Explain the difference between object instantiation and initialization. - Under what conditions is a static block executed in C++? - Why are generics used in C++? - Mention some design patterns you are familiar with. Which do you typically use? - Name some types of testing methodologies in C++. Senior: - Explain how std::stoi (string to integer) works in C++. - What is the "double-check locking" problem, and how can it be solved in C++? - Differentiate between StringBuffer and StringBuilder in C++. - How is StringBuilder implemented to avoid the immutable string allocation problem? - Explain the purpose of the Class.forName method in C++. - Define Autoboxing and Unboxing in C++. - What's the difference between Enumeration and Iterator in C++? - Explain the difference between fail-fast and fail-safe in C++. - What is PermGen in C++? - Describe a Java priority queue. - How is performance influenced by using the same number in different types: Int, Double, and Float? - Explain the concept of the Java Heap. - What is a daemon thread? - Can a dead thread be restarted in C++? *React ❤️ for more*

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10 FullStack Projects Every Beginner Should Must Build 🤩 Watch Full Tutorial 👇 https://youtu.be/x5tqxmXrJQk?si=hVLQTFxkaRpzux4Z

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