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El canal Programming Resources | Python | Javascript | Artificial Intelligence Updates | Computer Science Courses | AI Books (@programming_guide) en el segmento lingüístico de Inglés es un actor destacado. Actualmente la comunidad reúne a 56 099 suscriptores, ocupando la posición 2 368 en la categoría Tecnologías y Aplicaciones y el puesto 6 556 en la región India.

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Según los últimos datos del 08 junio, 2026, el canal mantiene una actividad estable. En los últimos 30 días la variación de miembros fue de 104, y en las últimas 24 horas de -6, conservando un alto alcance.

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Everything about programming for beginners * Python programming * Java programming * App development * Machine Learning * Data Science Managed by: @love_data

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Top Web Development Interview Questions & Answers 🌐💻 📍 1. What is the difference between Frontend and Backend development? Answer: Frontend deals with the part of the website users interact with (UI/UX), using HTML, CSS, JavaScript frameworks like React or Vue. Backend handles server-side logic, databases, and APIs using languages like Node.js, Python, or PHP. 📍 2. What is REST and why is it important? Answer: REST (Representational State Transfer) is an architectural style for designing APIs. It uses HTTP methods (GET, POST, PUT, DELETE) to manipulate resources and enables communication between client and server efficiently. 📍 3. Explain the concept of Responsive Design. Answer: Responsive Design ensures web pages render well on various devices and screen sizes by using flexible grids, images, and CSS media queries. 📍 4. What are CSS Flexbox and Grid? Answer: Both are CSS layout modules. Flexbox is for one-dimensional layouts (row or column), while Grid manages two-dimensional layouts (rows and columns), simplifying complex page structures. 📍 5. What is the Virtual DOM in React? Answer: A lightweight copy of the real DOM that React uses to efficiently update only parts of the UI that changed, improving performance. 📍 6. How do you handle authentication in web applications? Answer: Common methods include sessions with cookies, tokens like JWT, OAuth, or third-party providers (Google, Facebook). 📍 7. What is CORS and how do you handle it? Answer: Cross-Origin Resource Sharing (CORS) is a security feature blocking requests from different origins. Handled by setting appropriate headers on the server to allow trusted domains. 📍 8. Explain Event Loop and Asynchronous programming in JavaScript. Answer: Event Loop allows JavaScript to perform non-blocking actions by handling callbacks, promises, and async/await, enabling concurrency even though JS is single-threaded. 📍 9. What is the difference between SQL and NoSQL databases? Answer: SQL databases are relational, use structured schemas with tables (e.g., MySQL). NoSQL databases are non-relational, schema-flexible, and handle unstructured data (e.g., MongoDB). 📍 🔟 What are WebSockets? Answer: WebSockets provide full-duplex communication channels over a single TCP connection, enabling real-time data flow between client and server. 💡 Pro Tip: Back answers with examples or a small snippet, and relate them to projects you’ve built. Be ready to explain trade-offs between technologies. ❤️ Tap for more!

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Core Data Structures Part 2 – Stacks Queues 📚📥📤 Stacks and queues are fundamental linear data structures used in many algorithms and real-world applications like undo operations, task scheduling, and more. 1️⃣ What is a Stack? A Stack is a Last-In-First-Out (LIFO) structure. Think of a stack of plates: you add (push) and remove (pop) from the top. Operations: • push(item) – Add item to the top • pop() – Remove item from the top • peek() – View top item without removing • is_empty() – Check if stack is empty Python Implementation (Using List)
stack = []

# Push
stack.append(10)
stack.append(20)

# Pop
print(stack.pop())  # 20

# Peek
print(stack[-1])    # 10

# Check empty
print(len(stack) == 0)
2️⃣ What is a Queue? A Queue is a First-In-First-Out (FIFO) structure. Think of a line at a ticket counter: first come, first served. Operations: • enqueue(item) – Add item to the rear • dequeue() – Remove item from the front • peek() – View front item • is_empty() – Check if queue is empty Python Implementation (Using collections.deque)
from collections import deque

queue = deque()

# Enqueue
queue.append(10)
queue.append(20)

# Dequeue
print(queue.popleft())  # 10

# Peek
print(queue[0])         # 20

# Check empty
print(len(queue) == 0)
3️⃣ Stack Using Linked List (Python)
class Node:
    def __init__(self, data):
        self.data = data
        self.next = None

class Stack:
    def __init__(self):
        self.top = None

    def push(self, data):
        node = Node(data)
        node.next = self.top
        self.top = node

    def pop(self):
        if not self.top:
            return None
        data = self.top.data
        self.top = self.top.next
        return data
4️⃣ Queue Using Linked List (Python)
class Node:
    def __init__(self, data):
        self.data = data
        self.next = None

class Queue:
    def __init__(self):
        self.front = self.rear = None

    def enqueue(self, data):
        node = Node(data)
        if not self.rear:
            self.front = self.rear = node
        else:
            self.rear.next = node
            self.rear = node

    def dequeue(self):
        if not self.front:
            return None
        data = self.front.data
        self.front = self.front.next
        if not self.front:
            self.rear = None
        return data
📝 Practice Tasks 1. Implement a stack using a list 2. Implement a queue using a list 3. Reverse a string using a stack 4. Check for balanced parentheses using a stack 5. Simulate a queue using two stacks Double Tap ♥️ For More

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Here is the reformatted text: Coding interview questions with concise answers for software roles: 1️⃣ What happens when you type a URL and hit Enter? Answer: - DNS Lookup → IP address - Browser sends HTTP/HTTPS request - Server responds with HTML/CSS/JS - Browser builds DOM, applies styles (CSSOM), runs JS - Page is rendered 2️⃣ Difference between var, let, and const? Answer: - var: function-scoped, hoisted - let: block-scoped, not hoisted - const: block-scoped, can’t be reassigned 3️⃣ Reverse a String in JavaScript
function reverseString(str) {
  return str.split('').reverse().join('');
}

4️⃣ Find the max number in an array
const max = Math.max(...arr);

5️⃣ Write a function to check if a number is prime
function isPrime(n) {
  if (n < 2) return false;
  for (let i = 2; i <= Math.sqrt(n); i++) {
    if (n % i === 0) return false;
  }
  return true;
}

6️⃣ What is closure in JavaScript? Answer: A function that remembers variables from its outer scope even after the outer function has returned. 7️⃣ What is event delegation? Answer: Attaching a single event listener to a parent element to manage events on its children using event.target. 8️⃣ Difference between == and === Answer: - == checks value (with type coercion) - === checks value + type (strict comparison) 9️⃣ What is the Virtual DOM? Answer: A lightweight copy of the real DOM used in React. React updates the virtual DOM first and then applies only the changes to the real DOM for efficiency. 🔟 Write code to remove duplicates from an array
const uniqueArr = [...new Set(arr)];

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