Daily Coding Challenges & Projects

Frontend Mini Project Challenge

Tech : JavaScript Logical Puzzle

Challenge :

Write a JavaScript function isAnagram(str1, str2) that checks whether two input strings are anagrams of each other (ignoring case, spaces, and punctuation).

Hint : Normalize strings and sort characters.

Try it Live : JSFiddle Starter or CodePen.

Backend Challenge

C, C++, C# Focus

Language : Choose any (C / C++ / C#)

Problem : Implement a function to detect whether a given singly linked list contains a cycle.

Hint : Use Floyd’s Tortoise and Hare algorithm

Database Query Challenge

Problems on SQL - HR Database :

1. Employees with exactly 5 years in the company
2. Departments with no managers assigned

Data Structures & Algorithms Challenge

• Easy:
• Problem :Check if a string is a palindrome.
• Hint :Compare first and last characters recursively or with two pointers.
• Medium:
• Problem :Implement a stack using two queues.
• Hint : Push normally, for pop transfer all but last to temp queue.
• Hard:
• Problem :Find the longest increasing subsequence in an array.
• Hint :Use dynamic programming or patience sorting.

Bug of the Day

Language : C

Swift Bug

Buggy Code:

#include 
int main() {
    int a = 5;
    if (a = 10) {
        printf("True\n");
    } else {
        printf("False\n");
    }
    return 0;
}

Task : What’s the bug? Fix it so the condition checks correctly.

📋 Daily Micro-Project

Frontend Focus :

Task : Build a Numeric Counter using only HTML + JS

• Display a number starting at 0
• Two buttons: [+] to increment, [-] to decrement
• Bonus: Prevent counter from going negative

Trivia: 5 Fun Facts

1. The first ever computer programmer was Ada Lovelace.
2. C was developed at Bell Labs by Dennis Ritchie.
3. Stack Overflow launched in 2008 by Jeff Atwood and Joel Spolsky.
4. The first web page was published in 1991.
5. C# was developed by Microsoft in the early 2000s as part of .NET.

Tool & Resource of the Day

Tool : JSBin

A live JavaScript playground for testing JS, HTML, and CSS.

JSBin

Resource Roundup : Frontend Challenges

• Free JavaScript eBook (Eloquent JS)
• C Programming Cheatsheet (MIT)

Interview Question of the Day

Daily Interview Questions

Frontend ( JavaScript ) :
1. What is the difference between == and ===?
2. What is hoisting in JavaScript?
3. What does bind() do?
4. Explain event bubbling vs capturing.

Backend ( C/C++/C# ) :
1. What is a segmentation fault in C?
2. How does memory allocation differ in C vs C++?
3. What are pointers? How are they used in C?
4. Explain garbage collection in C#.

Database ( SQL ) :
1. Difference between GROUP BY and ORDER BY.
2. What is a foreign key?
3. How does normalization reduce redundancy?

Others :
1. What is a compiler vs interpreter?
2. What is a race condition?

Daily Quiz Challenge

Frontend Quiz :

1. What is the output of: console.log(typeof null)?
2. Which event occurs when an input field loses focus?
3. How do you prevent default link behavior?

Backend Quiz :

1. What is the output of printf("%d", 10/3); in C?
2. Which access modifier allows access only within the same class (C#)?
3. Which data structure is used by recursion (implicitly)?

Databases & Other :

1. Which SQL keyword is used to get unique records?
2. What is the use of volatile keyword in C?

Mixed Quiz :

1. Write one key difference between var and let in JS.
2. Identify the output: 5 + '5' in JS.
3. What is the purpose of a foreign key in databases?

Weekly Cross-Domain Activities ( July 11 to July 17, 2025 )

API of the Day:

Task : Build a stock price tracker using Twelve Data API.

https://twelvedata.com.

Linux/DevOps Tip :

Use htop instead of top for a better interactive process viewer.

Real-World Project of the Week ( July 11 to July 17, 2025 )

Project of the Week:

Build an Expense Tracker using React + Express + MongoDB.

Collaborative Project:

Join the GitHub project “open-budget-app” and contribute a budget visualization module

Case Study:

Analyze how GitHub Actions works and create a basic CI pipeline using YAML.