📚 Top 10 HTML Interview Questions With Answers
1. What is HTML?
HTML (HyperText Markup Language) is the standard language used to create and design web pages. It structures content by using elements and tags.
2. What are the different types of HTML tags?
There are block-level tags (like
3. What is the difference between HTML elements and tags?
A tag is the markup itself (e.g.,
4. What are semantic HTML elements?
Semantic elements clearly describe their meaning in a human- and machine-readable way. Examples include
5. What is the purpose of the
The
6. What are the different ways to include CSS in an HTML page?
CSS can be added via inline styles (
7. What is the difference between an ID and a Class in HTML?
ID is unique within a page and is used to identify a single element, while class can be assigned to multiple elements for styling or scripting.
8. How do you create a hyperlink in HTML?
Using the
9. What are HTML forms used for?
Forms collect user input and submit data to a server for processing, with tags like
10. What is the role of the
Meta tags provide metadata about the HTML document such as character set, page description, viewport settings, and SEO info.
Double Tap ♥️ For More
1. What is HTML?
HTML (HyperText Markup Language) is the standard language used to create and design web pages. It structures content by using elements and tags.
2. What are the different types of HTML tags?
There are block-level tags (like
<div>, <p>, <h1>) which start on a new line, and inline tags (like <span>, <a>, <img>) which do not start on a new line.3. What is the difference between HTML elements and tags?
A tag is the markup itself (e.g.,
<p>), while an element includes the opening tag, content, and closing tag (<p>Content</p>).4. What are semantic HTML elements?
Semantic elements clearly describe their meaning in a human- and machine-readable way. Examples include
<header>, <footer>, <article>, and <section>.5. What is the purpose of the
doctype declaration in HTML? The
<!DOCTYPE html> declaration defines the document type and version of HTML, helping browsers render the page correctly.6. What are the different ways to include CSS in an HTML page?
CSS can be added via inline styles (
style attribute), internal styles (<style> tag inside <head>), or external style sheets linked via <link> tag.7. What is the difference between an ID and a Class in HTML?
ID is unique within a page and is used to identify a single element, while class can be assigned to multiple elements for styling or scripting.
8. How do you create a hyperlink in HTML?
Using the
<a> tag with an href attribute, e.g., <a href="https://example.com">Link</a>.9. What are HTML forms used for?
Forms collect user input and submit data to a server for processing, with tags like
<form>, <input>, <textarea>, <button>, and more.10. What is the role of the
<meta> tag in HTML? Meta tags provide metadata about the HTML document such as character set, page description, viewport settings, and SEO info.
Double Tap ♥️ For More
❤8👍1
🔥 Ultimate Coding Interview Cheat Sheet (2025 Edition)
✅ 1. Data Structures
Key Concepts:
• Arrays/Lists
• Strings
• Hashmaps (Dicts)
• Stacks & Queues
• Linked Lists
• Trees (BST, Binary)
• Graphs
• Heaps
Practice Questions:
• Reverse a string or array
• Detect duplicates in an array
• Find missing number
• Implement stack using queue
• Traverse binary tree (Inorder, Preorder)
✅ 2. Algorithms
Key Concepts:
• Sorting (Quick, Merge, Bubble)
• Searching (Binary search)
• Recursion
• Backtracking
• Divide & Conquer
• Greedy
• Dynamic Programming
Practice Questions:
• Fibonacci with DP
• Merge sort implementation
• N-Queens Problem
• Knapsack problem
• Coin change
✅ 3. Problem Solving Patterns
Important Patterns:
• Two Pointers
• Sliding Window
• Fast & Slow Pointer
• Recursion + Memoization
• Prefix Sum
• Binary Search on answer
Practice Questions:
• Longest Substring Without Repeat
• Max Sum Subarray of Size K
• Linked list cycle detection
• Peak Element
✅ 4. System Design Basics
Key Concepts:
• Scalability, Load Balancing
• Caching (Redis)
• Rate Limiting
• APIs and Databases
• CAP Theorem
• Consistency vs Availability
Practice Projects:
• Design URL shortener
• Design Twitter feed
• Design chat system (e.g., WhatsApp)
✅ 5. OOP & Programming Basics
Key Concepts:
• Classes & Objects
• Inheritance, Polymorphism
• Encapsulation, Abstraction
• SOLID Principles
Practice Projects:
• Design a Library System
• Implement Parking Lot
• Bank Account Simulation
✅ 6. SQL & Database Concepts
Key Concepts:
• Joins (INNER, LEFT, RIGHT)
• GROUP BY, HAVING
• Subqueries
• Window Functions
• Indexing
Practice Queries:
• Get top 3 salaries
• Find duplicate emails
• Most frequent orders per user
👍 Double Tap ♥️ For More
✅ 1. Data Structures
Key Concepts:
• Arrays/Lists
• Strings
• Hashmaps (Dicts)
• Stacks & Queues
• Linked Lists
• Trees (BST, Binary)
• Graphs
• Heaps
Practice Questions:
• Reverse a string or array
• Detect duplicates in an array
• Find missing number
• Implement stack using queue
• Traverse binary tree (Inorder, Preorder)
✅ 2. Algorithms
Key Concepts:
• Sorting (Quick, Merge, Bubble)
• Searching (Binary search)
• Recursion
• Backtracking
• Divide & Conquer
• Greedy
• Dynamic Programming
Practice Questions:
• Fibonacci with DP
• Merge sort implementation
• N-Queens Problem
• Knapsack problem
• Coin change
✅ 3. Problem Solving Patterns
Important Patterns:
• Two Pointers
• Sliding Window
• Fast & Slow Pointer
• Recursion + Memoization
• Prefix Sum
• Binary Search on answer
Practice Questions:
• Longest Substring Without Repeat
• Max Sum Subarray of Size K
• Linked list cycle detection
• Peak Element
✅ 4. System Design Basics
Key Concepts:
• Scalability, Load Balancing
• Caching (Redis)
• Rate Limiting
• APIs and Databases
• CAP Theorem
• Consistency vs Availability
Practice Projects:
• Design URL shortener
• Design Twitter feed
• Design chat system (e.g., WhatsApp)
✅ 5. OOP & Programming Basics
Key Concepts:
• Classes & Objects
• Inheritance, Polymorphism
• Encapsulation, Abstraction
• SOLID Principles
Practice Projects:
• Design a Library System
• Implement Parking Lot
• Bank Account Simulation
✅ 6. SQL & Database Concepts
Key Concepts:
• Joins (INNER, LEFT, RIGHT)
• GROUP BY, HAVING
• Subqueries
• Window Functions
• Indexing
Practice Queries:
• Get top 3 salaries
• Find duplicate emails
• Most frequent orders per user
👍 Double Tap ♥️ For More
❤11
Here are some tricky🧩 SQL interview questions!
1. Find the second-highest salary in a table without using LIMIT or TOP.
2. Write a SQL query to find all employees who earn more than their managers.
3. Find the duplicate rows in a table without using GROUP BY.
4. Write a SQL query to find the top 10% of earners in a table.
5. Find the cumulative sum of a column in a table.
6. Write a SQL query to find all employees who have never taken a leave.
7. Find the difference between the current row and the next row in a table.
8. Write a SQL query to find all departments with more than one employee.
9. Find the maximum value of a column for each group without using GROUP BY.
10. Write a SQL query to find all employees who have taken more than 3 leaves in a month.
These questions are designed to test your SQL skills, including your ability to write efficient queries, think creatively, and solve complex problems.
Here are the answers to these questions:
1. SELECT MAX(salary) FROM table WHERE salary NOT IN (SELECT MAX(salary) FROM table)
2. SELECT e1.* FROM employees e1 JOIN employees e2 ON e1.manager_id = (link unavailable) WHERE e1.salary > e2.salary
3. SELECT * FROM table WHERE rowid IN (SELECT rowid FROM table GROUP BY column HAVING COUNT(*) > 1)
4. SELECT * FROM table WHERE salary > (SELECT PERCENTILE_CONT(0.9) WITHIN GROUP (ORDER BY salary) FROM table)
5. SELECT column, SUM(column) OVER (ORDER BY rowid) FROM table
6. SELECT * FROM employees WHERE id NOT IN (SELECT employee_id FROM leaves)
7. SELECT *, column - LEAD(column) OVER (ORDER BY rowid) FROM table
8. SELECT department FROM employees GROUP BY department HAVING COUNT(*) > 1
9. SELECT MAX(column) FROM table WHERE column NOT IN (SELECT MAX(column) FROM table GROUP BY group_column)
1. Find the second-highest salary in a table without using LIMIT or TOP.
2. Write a SQL query to find all employees who earn more than their managers.
3. Find the duplicate rows in a table without using GROUP BY.
4. Write a SQL query to find the top 10% of earners in a table.
5. Find the cumulative sum of a column in a table.
6. Write a SQL query to find all employees who have never taken a leave.
7. Find the difference between the current row and the next row in a table.
8. Write a SQL query to find all departments with more than one employee.
9. Find the maximum value of a column for each group without using GROUP BY.
10. Write a SQL query to find all employees who have taken more than 3 leaves in a month.
These questions are designed to test your SQL skills, including your ability to write efficient queries, think creatively, and solve complex problems.
Here are the answers to these questions:
1. SELECT MAX(salary) FROM table WHERE salary NOT IN (SELECT MAX(salary) FROM table)
2. SELECT e1.* FROM employees e1 JOIN employees e2 ON e1.manager_id = (link unavailable) WHERE e1.salary > e2.salary
3. SELECT * FROM table WHERE rowid IN (SELECT rowid FROM table GROUP BY column HAVING COUNT(*) > 1)
4. SELECT * FROM table WHERE salary > (SELECT PERCENTILE_CONT(0.9) WITHIN GROUP (ORDER BY salary) FROM table)
5. SELECT column, SUM(column) OVER (ORDER BY rowid) FROM table
6. SELECT * FROM employees WHERE id NOT IN (SELECT employee_id FROM leaves)
7. SELECT *, column - LEAD(column) OVER (ORDER BY rowid) FROM table
8. SELECT department FROM employees GROUP BY department HAVING COUNT(*) > 1
9. SELECT MAX(column) FROM table WHERE column NOT IN (SELECT MAX(column) FROM table GROUP BY group_column)
❤4
🔥 Guys, Another Big Announcement!
I’m launching a Python Interview Series 🐍💼 — your complete guide to cracking Python interviews from beginner to advanced level!
This will be a week-by-week series designed to make you interview-ready — covering core concepts, coding questions, and real interview scenarios asked by top companies.
Here’s what’s coming your way 👇
🔹 Week 1: Python Fundamentals (Beginner Level)
• Data types, variables & operators
• If-else, loops & functions
• Input/output & basic problem-solving
💡 *Practice:* Reverse string, Prime check, Factorial, Palindrome
🔹 Week 2: Data Structures in Python
• Lists, Tuples, Sets, Dictionaries
• Comprehensions (list, dict, set)
• Sorting, searching, and nested structures
💡 *Practice:* Frequency count, remove duplicates, find max/min
🔹 Week 3: Functions, Modules & File Handling
•
• File read/write, CSV handling
• Modules & imports
💡 *Practice:* Create custom functions, read data files, handle errors
🔹 Week 4: Object-Oriented Programming (OOP)
• Classes, objects, inheritance, polymorphism
• Encapsulation & abstraction
• Magic methods (
💡 *Practice:* Build a simple class like BankAccount or StudentSystem
🔹 Week 5: Exception Handling & Logging
•
• Custom exceptions
• Logging errors & debugging best practices
💡 *Practice:* File operations with proper error handling
🔹 Week 6: Advanced Python Concepts
• Decorators, generators, iterators
• Closures & context managers
• Shallow vs deep copy
💡 *Practice:* Create your own decorator, generator examples
🔹 Week 7: Pandas & NumPy for Data Analysis
• DataFrame basics, filtering & grouping
• Handling missing data
• NumPy arrays, slicing, and aggregation
💡 *Practice:* Analyze small CSV datasets
🔹 Week 8: Python for Analytics & Visualization
• Matplotlib, Seaborn basics
• Data summarization & correlation
• Building simple dashboards
💡 *Practice:* Visualize sales or user data
🔹 Week 9: Real Interview Questions (Intermediate–Advanced)
• 50+ Python interview questions with answers
• Common logical & coding tasks
• Real company-style questions (Infosys, TCS, Deloitte, etc.)
💡 *Practice:* Solve daily problem sets
🔹 Week 10: Final Interview Prep (Mock & Revision)
• End-to-end mock interviews
• Python project discussion tips
• Resume & GitHub portfolio guidance
📌 Each week includes:
✅ Key Concepts & Examples
✅ Coding Snippets & Practice Tasks
✅ Real Interview Q&A
✅ Mini Quiz & Discussion
👍 React ❤️ if you’re ready to master Python interviews!
👇 You can access it from here: https://whatsapp.com/channel/0029VaiM08SDuMRaGKd9Wv0L/2099
I’m launching a Python Interview Series 🐍💼 — your complete guide to cracking Python interviews from beginner to advanced level!
This will be a week-by-week series designed to make you interview-ready — covering core concepts, coding questions, and real interview scenarios asked by top companies.
Here’s what’s coming your way 👇
🔹 Week 1: Python Fundamentals (Beginner Level)
• Data types, variables & operators
• If-else, loops & functions
• Input/output & basic problem-solving
💡 *Practice:* Reverse string, Prime check, Factorial, Palindrome
🔹 Week 2: Data Structures in Python
• Lists, Tuples, Sets, Dictionaries
• Comprehensions (list, dict, set)
• Sorting, searching, and nested structures
💡 *Practice:* Frequency count, remove duplicates, find max/min
🔹 Week 3: Functions, Modules & File Handling
•
*args, *kwargs, lambda, map/filter/reduce• File read/write, CSV handling
• Modules & imports
💡 *Practice:* Create custom functions, read data files, handle errors
🔹 Week 4: Object-Oriented Programming (OOP)
• Classes, objects, inheritance, polymorphism
• Encapsulation & abstraction
• Magic methods (
__init__, __str__)💡 *Practice:* Build a simple class like BankAccount or StudentSystem
🔹 Week 5: Exception Handling & Logging
•
try-except-else-finally• Custom exceptions
• Logging errors & debugging best practices
💡 *Practice:* File operations with proper error handling
🔹 Week 6: Advanced Python Concepts
• Decorators, generators, iterators
• Closures & context managers
• Shallow vs deep copy
💡 *Practice:* Create your own decorator, generator examples
🔹 Week 7: Pandas & NumPy for Data Analysis
• DataFrame basics, filtering & grouping
• Handling missing data
• NumPy arrays, slicing, and aggregation
💡 *Practice:* Analyze small CSV datasets
🔹 Week 8: Python for Analytics & Visualization
• Matplotlib, Seaborn basics
• Data summarization & correlation
• Building simple dashboards
💡 *Practice:* Visualize sales or user data
🔹 Week 9: Real Interview Questions (Intermediate–Advanced)
• 50+ Python interview questions with answers
• Common logical & coding tasks
• Real company-style questions (Infosys, TCS, Deloitte, etc.)
💡 *Practice:* Solve daily problem sets
🔹 Week 10: Final Interview Prep (Mock & Revision)
• End-to-end mock interviews
• Python project discussion tips
• Resume & GitHub portfolio guidance
📌 Each week includes:
✅ Key Concepts & Examples
✅ Coding Snippets & Practice Tasks
✅ Real Interview Q&A
✅ Mini Quiz & Discussion
👍 React ❤️ if you’re ready to master Python interviews!
👇 You can access it from here: https://whatsapp.com/channel/0029VaiM08SDuMRaGKd9Wv0L/2099
❤9
🚀 Front-End Development Interview Topics
HTML & CSS
🔹 Semantic HTML
🔹 CSS Pre-Processors
🔹 CSS Specificity
🔹 Resetting & Normalizing CSS
🔹 CSS Architecture
🔹 SVGs
🔹 Media Queries
🔹 CSS Display Property
🔹 CSS Position Property
🔹 CSS Frameworks
🔹 Pseudo Classes
🔹 Sprites
JavaScript
🔹 Event Delegation
🔹 Attributes vs Properties
🔹 Ternary Operators
🔹 Promises vs Callbacks
🔹 Single Page Application
🔹 Higher-Order Functions
🔹 == vs ===
🔹 Mutable vs Immutable
🔹 'this'
🔹 Prototypal Inheritance
🔹 IFE (Immediately Invoked Function Expression)
🔹 Closure
🔹 Null vs Undefined
🔹 OOP vs Map
🔹 .call & .apply
🔹 Hoisting
🔹 Objects
🔹 Scope
🔹 JS Frameworks
Data Structures and Algorithms
🔹 Linked Lists
🔹 Hash Tables
🔹 Stacks
🔹 Queues
🔹 Trees
🔹 Graphs
🔹 Arrays
🔹 Bubble Sort
🔹 Binary Search
🔹 Selection Sort
🔹 Quick Sort
🔹 Insertion Sort
Front-End Topics
🔹 Performance
🔹 Unit Testing
🔹 End-to-End Testing (E2E)
🔹 Web Accessibility
🔹 CORS
🔹 SEO
🔹 REST
🔹 APIs
🔹 HTTP/HTTPS
🔹 GitHub
🔹 Task Runners
🔹 Browser APIs
HTML & CSS
🔹 Semantic HTML
🔹 CSS Pre-Processors
🔹 CSS Specificity
🔹 Resetting & Normalizing CSS
🔹 CSS Architecture
🔹 SVGs
🔹 Media Queries
🔹 CSS Display Property
🔹 CSS Position Property
🔹 CSS Frameworks
🔹 Pseudo Classes
🔹 Sprites
JavaScript
🔹 Event Delegation
🔹 Attributes vs Properties
🔹 Ternary Operators
🔹 Promises vs Callbacks
🔹 Single Page Application
🔹 Higher-Order Functions
🔹 == vs ===
🔹 Mutable vs Immutable
🔹 'this'
🔹 Prototypal Inheritance
🔹 IFE (Immediately Invoked Function Expression)
🔹 Closure
🔹 Null vs Undefined
🔹 OOP vs Map
🔹 .call & .apply
🔹 Hoisting
🔹 Objects
🔹 Scope
🔹 JS Frameworks
Data Structures and Algorithms
🔹 Linked Lists
🔹 Hash Tables
🔹 Stacks
🔹 Queues
🔹 Trees
🔹 Graphs
🔹 Arrays
🔹 Bubble Sort
🔹 Binary Search
🔹 Selection Sort
🔹 Quick Sort
🔹 Insertion Sort
Front-End Topics
🔹 Performance
🔹 Unit Testing
🔹 End-to-End Testing (E2E)
🔹 Web Accessibility
🔹 CORS
🔹 SEO
🔹 REST
🔹 APIs
🔹 HTTP/HTTPS
🔹 GitHub
🔹 Task Runners
🔹 Browser APIs
❤14👍1
Javascript for Everything:
JS + React = Web Development
JS + Three.js = 3D Visualization
JS + Angular = Web Applications
JS + Phaser = Game Development
JS + Vue.js = Progressive Web Apps
JS + TensorFlow.js = Machine Learning
JS + Node.js = Server-Side Development
JS + Electron = DesktopApp Development
JS + React Native = MobileApp Development
#javascript
JS + React = Web Development
JS + Three.js = 3D Visualization
JS + Angular = Web Applications
JS + Phaser = Game Development
JS + Vue.js = Progressive Web Apps
JS + TensorFlow.js = Machine Learning
JS + Node.js = Server-Side Development
JS + Electron = DesktopApp Development
JS + React Native = MobileApp Development
#javascript
❤11
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https://whatsapp.com/channel/0029VaiM08SDuMRaGKd9Wv0L
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❤10
🤩 Quick Roadmaps to Learn 🤩
❤️ Javascript
https://roadmap.sh/javascript
❤️ Data Science
https://miro.medium.com/max/828/1*UQ9M5X6R1LVPzwc4bfnt9w.webp
❤️ Frontend development
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❤️ Data Analyst Roadmap
https://t.me/sqlspecialist/379
❤️ AI/ML
https://i.am.ai/roadmap
❤️ Javascript
https://roadmap.sh/javascript
❤️ Data Science
https://miro.medium.com/max/828/1*UQ9M5X6R1LVPzwc4bfnt9w.webp
❤️ Frontend development
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❤️ Data Analyst Roadmap
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❤️ AI/ML
https://i.am.ai/roadmap
❤4
10 Python Mini Projects for Beginners
Guys, once you've got the basics of Python down, it’s time to build stuff!
Here are 10 mini project ideas that are fun, practical, and boost your confidence!
1. Number Guessing Game 🎯
The computer picks a number, and the user keeps guessing until they get it right.
Perfect to practice loops, conditionals, and user input.
2. Calculator App ➕➖✖️➗
Build a simple calculator that takes two numbers and performs addition, subtraction, multiplication, or division.
3. To-Do List (Console Version) ✅
Let users add, view, and delete tasks. Great to practice lists and file handling if you want to save tasks.
4. Password Generator 🔐
Create random passwords using letters, numbers, and symbols. Use the random and string modules.
5. Dice Rolling Simulator 🎲
Simulate rolling a die. Add cool features like rolling multiple dice or counting the frequency.
6. Rock Paper Scissors Game ✊✋✌️
Let the user play against the computer. Introduces randomness and conditional logic.
7. Quiz App ❓
Create a multiple-choice quiz that gives a score at the end. Store questions and answers using dictionaries.
8. Countdown Timer ⏱️
User inputs minutes or seconds, and the timer counts down to zero. Helps practice time.sleep().
9. Tip Calculator 🍽️
Calculate how much each person should pay including tip. Useful for string formatting and arithmetic.
10. Weather App (Using API) ☁️☀️🌧️
Use a public weather API to fetch real-time weather for a city. Great to explore APIs and the requests library.
For all resources and cheat sheets, check out my Telegram channel: https://t.me/pythonproz
Hope it helps :)
Guys, once you've got the basics of Python down, it’s time to build stuff!
Here are 10 mini project ideas that are fun, practical, and boost your confidence!
1. Number Guessing Game 🎯
The computer picks a number, and the user keeps guessing until they get it right.
Perfect to practice loops, conditionals, and user input.
2. Calculator App ➕➖✖️➗
Build a simple calculator that takes two numbers and performs addition, subtraction, multiplication, or division.
3. To-Do List (Console Version) ✅
Let users add, view, and delete tasks. Great to practice lists and file handling if you want to save tasks.
4. Password Generator 🔐
Create random passwords using letters, numbers, and symbols. Use the random and string modules.
5. Dice Rolling Simulator 🎲
Simulate rolling a die. Add cool features like rolling multiple dice or counting the frequency.
6. Rock Paper Scissors Game ✊✋✌️
Let the user play against the computer. Introduces randomness and conditional logic.
7. Quiz App ❓
Create a multiple-choice quiz that gives a score at the end. Store questions and answers using dictionaries.
8. Countdown Timer ⏱️
User inputs minutes or seconds, and the timer counts down to zero. Helps practice time.sleep().
9. Tip Calculator 🍽️
Calculate how much each person should pay including tip. Useful for string formatting and arithmetic.
10. Weather App (Using API) ☁️☀️🌧️
Use a public weather API to fetch real-time weather for a city. Great to explore APIs and the requests library.
For all resources and cheat sheets, check out my Telegram channel: https://t.me/pythonproz
Hope it helps :)
❤7
Media is too big
VIEW IN TELEGRAM
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- Real-time app demo.
- Add payments and monetize like in-app-purchase and Stripe.
- Functional login & signup.
- Database + dashboard in minutes.
- Preview, download, and publish to AppStore.
- Full tutorial on YouTube and within 1 day customer service
🫵It’s your shortcut from concept to cash flow.
❤2👌1
Top Coding Interview Questions 💻
📍 1. Two Sum Problem
Find two numbers in an array that add up to a target value.
Approach: Use a hash map to store complements for O(n) time.
📍 2. Reverse a Linked List
Reverse a singly linked list iteratively or recursively.
📍 3. Binary Tree Traversals
Implement Inorder, Preorder, and Postorder traversals (recursion or stack).
📍 4. Detect Cycle in a Linked List
Use Floyd’s Tortoise and Hare algorithm to detect if a loop exists.
📍 5. Merge Intervals
Given intervals, merge all overlapping intervals.
📍 6. Valid Parentheses
Use a stack to check for matching pairs of parentheses/brackets.
📍 7. Maximum Subarray Sum (Kadane’s Algorithm)
Find the contiguous subarray with the largest sum.
📍 8. Search in a Rotated Sorted Array
Modified binary search to find an element in a rotated sorted array.
📍 9. Implement Queue using Stacks
Use two stacks to simulate a queue’s FIFO behavior.
📍 🔟 Least Recently Used (LRU) Cache Implementation
Use a hashmap + doubly linked list for O(1) access and updates.
💡 Pro Tip: Master these core problems and practice explaining your thought process clearly. Also, get comfortable with coding on whiteboard or online editors.
📍 1. Two Sum Problem
Find two numbers in an array that add up to a target value.
Approach: Use a hash map to store complements for O(n) time.
📍 2. Reverse a Linked List
Reverse a singly linked list iteratively or recursively.
📍 3. Binary Tree Traversals
Implement Inorder, Preorder, and Postorder traversals (recursion or stack).
📍 4. Detect Cycle in a Linked List
Use Floyd’s Tortoise and Hare algorithm to detect if a loop exists.
📍 5. Merge Intervals
Given intervals, merge all overlapping intervals.
📍 6. Valid Parentheses
Use a stack to check for matching pairs of parentheses/brackets.
📍 7. Maximum Subarray Sum (Kadane’s Algorithm)
Find the contiguous subarray with the largest sum.
📍 8. Search in a Rotated Sorted Array
Modified binary search to find an element in a rotated sorted array.
📍 9. Implement Queue using Stacks
Use two stacks to simulate a queue’s FIFO behavior.
📍 🔟 Least Recently Used (LRU) Cache Implementation
Use a hashmap + doubly linked list for O(1) access and updates.
💡 Pro Tip: Master these core problems and practice explaining your thought process clearly. Also, get comfortable with coding on whiteboard or online editors.
❤9
10 Tools for Web Developers 🛠🚀 -
💻 Visual Studio Code - Lightweight code editor
🔍 Postman - API development and testing
🎨 CodePen - Front-end development playground
🐙 GitHub - Version control and collaboration
🎨 Figma - UI/UX design and prototyping
📊 Google Analytics - Website traffic analysis
🌐 Netlify - Easy web hosting and deployment
🔒 Auth0 - Authentication and authorization
📦 Webpack - Module bundler for modern JavaScript apps
📦 NPM - Node package manager for JavaScript libraries and tools
React ❤️ for more
💻 Visual Studio Code - Lightweight code editor
🔍 Postman - API development and testing
🎨 CodePen - Front-end development playground
🐙 GitHub - Version control and collaboration
🎨 Figma - UI/UX design and prototyping
📊 Google Analytics - Website traffic analysis
🌐 Netlify - Easy web hosting and deployment
🔒 Auth0 - Authentication and authorization
📦 Webpack - Module bundler for modern JavaScript apps
📦 NPM - Node package manager for JavaScript libraries and tools
React ❤️ for more
❤12🫡1
💡 10 Habits That Will Make You a Better Programmer in 2025
1) Write code every day
Consistency builds confidence. Even 30 minutes daily makes a difference.
2) Read others' code
Study open-source projects or solutions on GitHub. You'll learn new patterns and cleaner ways to solve problems.
3) Break problems into smaller parts
Don't jump in. Outline the logic step-by-step. Simpler structure means fewer bugs.
4) Learn to debug efficiently
Use print statements, breakpoints, and logs. Understand what your code is doing, not what you think it's doing.
5) Focus on fundamentals
Data structures and algorithms never go out of style. Master them.
6) Use version control (Git)
Track changes, collaborate smoothly, and avoid "final_final_v2_updatedFIXED" files.
7) Write clean, readable code
Follow naming conventions. Use meaningful function names and comments only when necessary.
8) Build real-world projects
Apply what you learn. Build apps, bots, tools—anything that solves a real problem.
9) Stay curious
Tech moves fast. Subscribe to dev newsletters, follow GitHub repos, and try new tools.
10) Ask better questions
Whether you're Googling or posting on forums, be clear. Show your thought process and what you've tried.
💬 Double Tap ♥️ For More
1) Write code every day
Consistency builds confidence. Even 30 minutes daily makes a difference.
2) Read others' code
Study open-source projects or solutions on GitHub. You'll learn new patterns and cleaner ways to solve problems.
3) Break problems into smaller parts
Don't jump in. Outline the logic step-by-step. Simpler structure means fewer bugs.
4) Learn to debug efficiently
Use print statements, breakpoints, and logs. Understand what your code is doing, not what you think it's doing.
5) Focus on fundamentals
Data structures and algorithms never go out of style. Master them.
6) Use version control (Git)
Track changes, collaborate smoothly, and avoid "final_final_v2_updatedFIXED" files.
7) Write clean, readable code
Follow naming conventions. Use meaningful function names and comments only when necessary.
8) Build real-world projects
Apply what you learn. Build apps, bots, tools—anything that solves a real problem.
9) Stay curious
Tech moves fast. Subscribe to dev newsletters, follow GitHub repos, and try new tools.
10) Ask better questions
Whether you're Googling or posting on forums, be clear. Show your thought process and what you've tried.
💬 Double Tap ♥️ For More
❤17👍1
🧠 10 Mindset Shifts to Succeed in Programming & AI 🚀💻
1️⃣ Learn by Building
→ Don’t just watch tutorials—create projects, even small ones. Practice beats theory.
2️⃣ Fail Fast, Learn Faster
→ Bugs and errors are part of the process. Debugging teaches more than smooth runs.
3️⃣ Think in Systems, Not Scripts
→ Build reusable, modular systems instead of one-time scripts.
4️⃣ Start with Logic, Then Code
→ Don’t jump into code. Understand the logic, sketch it out first.
5️⃣ Embrace the AI Toolkit
→ Use tools like ChatGPT, Copilot, LangChain—they boost your output, not replace you.
6️⃣ Read Source Code
→ Understand how libraries and tools work internally—it sharpens your skills.
7️⃣ Communicate Clearly
→ Great programmers explain problems, solutions, and code simply—write clean code & good docs.
8️⃣ Consistency > Intensity
→ Daily learning or coding (even 30 mins) compounds over time.
9️⃣ Ask Better Questions
→ Whether in forums or AI prompts, clarity in your question leads to better answers.
🔟 Stay Curious, Stay Humble
→ Tech changes fast. Stay open to learning and unlearning.
💬 Double Tap ❤️ for more!
1️⃣ Learn by Building
→ Don’t just watch tutorials—create projects, even small ones. Practice beats theory.
2️⃣ Fail Fast, Learn Faster
→ Bugs and errors are part of the process. Debugging teaches more than smooth runs.
3️⃣ Think in Systems, Not Scripts
→ Build reusable, modular systems instead of one-time scripts.
4️⃣ Start with Logic, Then Code
→ Don’t jump into code. Understand the logic, sketch it out first.
5️⃣ Embrace the AI Toolkit
→ Use tools like ChatGPT, Copilot, LangChain—they boost your output, not replace you.
6️⃣ Read Source Code
→ Understand how libraries and tools work internally—it sharpens your skills.
7️⃣ Communicate Clearly
→ Great programmers explain problems, solutions, and code simply—write clean code & good docs.
8️⃣ Consistency > Intensity
→ Daily learning or coding (even 30 mins) compounds over time.
9️⃣ Ask Better Questions
→ Whether in forums or AI prompts, clarity in your question leads to better answers.
🔟 Stay Curious, Stay Humble
→ Tech changes fast. Stay open to learning and unlearning.
💬 Double Tap ❤️ for more!
❤20
💻 10 Essential Coding Tips for Beginners 🖥️✨
1️⃣ Plan Before You Code
Think through logic, inputs, and outputs before writing code. Saves debugging time later—sketch pseudocode on paper first.
2️⃣ Keep Code Simple
Start with the simplest solution. Optimize only if necessary—complexity creeps in fast for new coders.
3️⃣ Use Functions Wisely
Break code into small, reusable functions. Avoid repetition—DRY (Don't Repeat Yourself) principle from day one.
4️⃣ Learn Debugging Early
Master print statements, IDE debuggers, and error logs. Read error messages carefully; they often point right to the fix.
5️⃣ Practice Test Cases
Always test with normal, edge, and invalid inputs. This catches bugs before they bite in real use.
6️⃣ Read Documentation
Libraries and frameworks have guides—use them to understand features correctly. Stack Overflow is your friend too.
7️⃣ Version Control Matters
Use Git to track changes and prevent accidental loss of work. Start with basic commands like commit and push.
8️⃣ Avoid Premature Optimization
First make it work, then make it fast. Focus on functionality over fancy tricks early on.
9️⃣ Comment Smartly
Explain why, not what. Clean code often speaks for itself—over-commenting can clutter.
🔟 Ask Questions
Forums, peers, or AI—don't struggle silently. Communities like Reddit's r/learnprogramming are goldmines.
💬 Tap ❤️ for more!
1️⃣ Plan Before You Code
Think through logic, inputs, and outputs before writing code. Saves debugging time later—sketch pseudocode on paper first.
2️⃣ Keep Code Simple
Start with the simplest solution. Optimize only if necessary—complexity creeps in fast for new coders.
3️⃣ Use Functions Wisely
Break code into small, reusable functions. Avoid repetition—DRY (Don't Repeat Yourself) principle from day one.
4️⃣ Learn Debugging Early
Master print statements, IDE debuggers, and error logs. Read error messages carefully; they often point right to the fix.
5️⃣ Practice Test Cases
Always test with normal, edge, and invalid inputs. This catches bugs before they bite in real use.
6️⃣ Read Documentation
Libraries and frameworks have guides—use them to understand features correctly. Stack Overflow is your friend too.
7️⃣ Version Control Matters
Use Git to track changes and prevent accidental loss of work. Start with basic commands like commit and push.
8️⃣ Avoid Premature Optimization
First make it work, then make it fast. Focus on functionality over fancy tricks early on.
9️⃣ Comment Smartly
Explain why, not what. Clean code often speaks for itself—over-commenting can clutter.
🔟 Ask Questions
Forums, peers, or AI—don't struggle silently. Communities like Reddit's r/learnprogramming are goldmines.
💬 Tap ❤️ for more!
❤13👍2🥰1🤣1
💻 Top Coding Languages for Beginners & Their Uses 🌟🚀
🔹 Python — Easy syntax, great for AI, web, and data
🔹 JavaScript — Web interactivity and frontend magic
🔹 Java — Enterprise apps and Android development
🔹 HTML/CSS — Website structure & styling basics
🔹 Scratch — Visual coding for kids & newbies
🔹 SQL — Managing and querying databases
🔹 C# — Game dev with Unity and Windows apps
🔹 Ruby — Simple web app building with Rails
🔹 Swift — Making apps for Apple devices
🔹 PHP — Server-side scripting for websites
💬 Tap ❤️ if you found this useful!
🔹 Python — Easy syntax, great for AI, web, and data
🔹 JavaScript — Web interactivity and frontend magic
🔹 Java — Enterprise apps and Android development
🔹 HTML/CSS — Website structure & styling basics
🔹 Scratch — Visual coding for kids & newbies
🔹 SQL — Managing and querying databases
🔹 C# — Game dev with Unity and Windows apps
🔹 Ruby — Simple web app building with Rails
🔹 Swift — Making apps for Apple devices
🔹 PHP — Server-side scripting for websites
💬 Tap ❤️ if you found this useful!
❤13👌1
The program for the 10th AI Journey 2025 international conference has been unveiled: scientists, visionaries, and global AI practitioners will come together on one stage. Here, you will hear the voices of those who don't just believe in the future—they are creating it!
Speakers include visionaries Kai-Fu Lee and Chen Qufan, as well as dozens of global AI gurus from around the world!
On the first day of the conference, November 19, we will talk about how AI is already being used in various areas of life, helping to unlock human potential for the future and changing creative industries, and what impact it has on humans and on a sustainable future.
On November 20, we will focus on the role of AI in business and economic development and present technologies that will help businesses and developers be more effective by unlocking human potential.
On November 21, we will talk about how engineers and scientists are making scientific and technological breakthroughs and creating the future today!
Ride the wave with AI into the future!
Tune in to the AI Journey webcast on November 19-21.
Speakers include visionaries Kai-Fu Lee and Chen Qufan, as well as dozens of global AI gurus from around the world!
On the first day of the conference, November 19, we will talk about how AI is already being used in various areas of life, helping to unlock human potential for the future and changing creative industries, and what impact it has on humans and on a sustainable future.
On November 20, we will focus on the role of AI in business and economic development and present technologies that will help businesses and developers be more effective by unlocking human potential.
On November 21, we will talk about how engineers and scientists are making scientific and technological breakthroughs and creating the future today!
Ride the wave with AI into the future!
Tune in to the AI Journey webcast on November 19-21.
❤5
✅ Step-by-Step Guide to Create a Programming Portfolio
✅ 1️⃣ Choose Your Tools & Skills
Decide what languages and tech to showcase:
⦁ Core: Python, JavaScript, Java, or C++
⦁ Frameworks: React/Vue for front-end, Node.js/Django for back-end
⦁ Other: Git, APIs, databases (MongoDB/SQL), testing (Jest/Pytest)
✅ 2️⃣ Plan Your Portfolio Structure
Your portfolio should include:
⦁ Home Page – Brief intro about you and your coding passion
⦁ About Me – Skills, languages, background, and tech stack
⦁ Projects – Highlighted with descriptions, code, and demos
⦁ Contact – Email, LinkedIn, GitHub, or a contact form
⦁ Optional: Blog on coding tips or case studies
✅ 3️⃣ Build Your Portfolio Website or Use Platforms
Options:
⦁ Build your own site with HTML/CSS/JS, React, or Next.js
⦁ Use GitHub Pages, Netlify, or Vercel for free hosting
⦁ Ensure it's responsive, fast-loading, and easy to navigate
✅ 4️⃣ Add 3–5 Detailed Projects
Projects should cover:
⦁ Full-stack apps, algorithms, or APIs
⦁ Front-end UIs, back-end services, or mobile apps
⦁ Version control, testing, and deployment
Each project should include:
⦁ Problem statement and goals
⦁ Tech stack and dataset/source (if applicable)
⦁ Tools & techniques used (e.g., React for UI, Node for server)
⦁ Key features, challenges solved, and results
⦁ Link to GitHub repo and live demo (e.g., on Heroku/Netlify)
✅ 5️⃣ Publish & Share Your Portfolio
Host your portfolio on:
⦁ GitHub Pages or personal domain
⦁ Vercel/Netlify for dynamic sites
⦁ Link from LinkedIn, resume, or dev communities
✅ 6️⃣ Keep It Updated
⦁ Add new projects or contributions regularly
⦁ Refine code based on feedback or refactoring
⦁ Share on Twitter, Reddit (r/learnprogramming), or dev blogs
💡 Pro Tips
⦁ Emphasize clean, commented code and READMEs with setup instructions
⦁ Include metrics like "Reduced load time by 40%" or live demos
⦁ Highlight problem-solving, like debugging or optimization
⦁ Add a resume download and social proof (e.g., stars on GitHub)
🎯 Goal: Visitors should see your coding prowess, explore runnable projects, and easily connect for opportunities.
✅ 1️⃣ Choose Your Tools & Skills
Decide what languages and tech to showcase:
⦁ Core: Python, JavaScript, Java, or C++
⦁ Frameworks: React/Vue for front-end, Node.js/Django for back-end
⦁ Other: Git, APIs, databases (MongoDB/SQL), testing (Jest/Pytest)
✅ 2️⃣ Plan Your Portfolio Structure
Your portfolio should include:
⦁ Home Page – Brief intro about you and your coding passion
⦁ About Me – Skills, languages, background, and tech stack
⦁ Projects – Highlighted with descriptions, code, and demos
⦁ Contact – Email, LinkedIn, GitHub, or a contact form
⦁ Optional: Blog on coding tips or case studies
✅ 3️⃣ Build Your Portfolio Website or Use Platforms
Options:
⦁ Build your own site with HTML/CSS/JS, React, or Next.js
⦁ Use GitHub Pages, Netlify, or Vercel for free hosting
⦁ Ensure it's responsive, fast-loading, and easy to navigate
✅ 4️⃣ Add 3–5 Detailed Projects
Projects should cover:
⦁ Full-stack apps, algorithms, or APIs
⦁ Front-end UIs, back-end services, or mobile apps
⦁ Version control, testing, and deployment
Each project should include:
⦁ Problem statement and goals
⦁ Tech stack and dataset/source (if applicable)
⦁ Tools & techniques used (e.g., React for UI, Node for server)
⦁ Key features, challenges solved, and results
⦁ Link to GitHub repo and live demo (e.g., on Heroku/Netlify)
✅ 5️⃣ Publish & Share Your Portfolio
Host your portfolio on:
⦁ GitHub Pages or personal domain
⦁ Vercel/Netlify for dynamic sites
⦁ Link from LinkedIn, resume, or dev communities
✅ 6️⃣ Keep It Updated
⦁ Add new projects or contributions regularly
⦁ Refine code based on feedback or refactoring
⦁ Share on Twitter, Reddit (r/learnprogramming), or dev blogs
💡 Pro Tips
⦁ Emphasize clean, commented code and READMEs with setup instructions
⦁ Include metrics like "Reduced load time by 40%" or live demos
⦁ Highlight problem-solving, like debugging or optimization
⦁ Add a resume download and social proof (e.g., stars on GitHub)
🎯 Goal: Visitors should see your coding prowess, explore runnable projects, and easily connect for opportunities.
❤5
Tune in to the 10th AI Journey 2025 international conference: scientists, visionaries, and global AI practitioners will come together on one stage. Here, you will hear the voices of those who don't just believe in the future—they are creating it!
Speakers include visionaries Kai-Fu Lee and Chen Qufan, as well as dozens of global AI gurus! Do you agree with their predictions about AI?
On the first day of the conference, November 19, we will talk about how AI is already being used in various areas of life, helping to unlock human potential for the future and changing creative industries, and what impact it has on humans and on a sustainable future.
On November 20, we will focus on the role of AI in business and economic development and present technologies that will help businesses and developers be more effective by unlocking human potential.
On November 21, we will talk about how engineers and scientists are making scientific and technological breakthroughs and creating the future today! The day's program includes presentations by scientists from around the world:
- Ajit Abraham (Sai University, India) will present on “Generative AI in Healthcare”
- Nebojša Bačanin Džakula (Singidunum University, Serbia) will talk about the latest advances in bio-inspired metaheuristics
- AIexandre Ferreira Ramos (University of São Paulo, Brazil) will present his work on using thermodynamic models to study the regulatory logic of transcriptional control at the DNA level
- Anderson Rocha (University of Campinas, Brazil) will give a presentation entitled “AI in the New Era: From Basics to Trends, Opportunities, and Global Cooperation”.
And in the special AIJ Junior track, we will talk about how AI helps us learn, create and ride the wave with AI.
The day will conclude with an award ceremony for the winners of the AI Challenge for aspiring data scientists and the AIJ Contest for experienced AI specialists. The results of an open selection of AIJ Science research papers will be announced.
Ride the wave with AI into the future!
Tune in to the AI Journey webcast on November 19-21.
Speakers include visionaries Kai-Fu Lee and Chen Qufan, as well as dozens of global AI gurus! Do you agree with their predictions about AI?
On the first day of the conference, November 19, we will talk about how AI is already being used in various areas of life, helping to unlock human potential for the future and changing creative industries, and what impact it has on humans and on a sustainable future.
On November 20, we will focus on the role of AI in business and economic development and present technologies that will help businesses and developers be more effective by unlocking human potential.
On November 21, we will talk about how engineers and scientists are making scientific and technological breakthroughs and creating the future today! The day's program includes presentations by scientists from around the world:
- Ajit Abraham (Sai University, India) will present on “Generative AI in Healthcare”
- Nebojša Bačanin Džakula (Singidunum University, Serbia) will talk about the latest advances in bio-inspired metaheuristics
- AIexandre Ferreira Ramos (University of São Paulo, Brazil) will present his work on using thermodynamic models to study the regulatory logic of transcriptional control at the DNA level
- Anderson Rocha (University of Campinas, Brazil) will give a presentation entitled “AI in the New Era: From Basics to Trends, Opportunities, and Global Cooperation”.
And in the special AIJ Junior track, we will talk about how AI helps us learn, create and ride the wave with AI.
The day will conclude with an award ceremony for the winners of the AI Challenge for aspiring data scientists and the AIJ Contest for experienced AI specialists. The results of an open selection of AIJ Science research papers will be announced.
Ride the wave with AI into the future!
Tune in to the AI Journey webcast on November 19-21.
❤4👍2