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DSA Questions in Python

Data Structures & Algorithms — solved in Python

Arrays & Strings

42 problems

Linked Lists

28 problems

Trees & Graphs

35 problems

Dynamic Programming

30 problems

Tech Quizzes

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Intermediate

__slots__ Quiz

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Compound Interest Advanced Quiz: Aptitude

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Chemistry Quiz

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General Science for Railway Group D

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The dot-com boom Quiz

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Earthquakes Quiz

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Mountains Ranges Peaks and Plateaus

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Troubleshooting pods Quiz

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The interpreter loop Quiz

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UN Organizations and Their Headquarters GK

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Backtracking Quiz

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Famous Inventors Quiz

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Coding Challenges

Solve real problems, earn points, climb the ranks

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Minimum Cost to Connect Sticks

Compute the minimum total cost to connect all sticks into one stick by repeatedly combining two sticks with the smallest lengths.

+25 pts Be first Solve →
medium

Divide using shifts

Implement division of two integers using only bit shifts and arithmetic, without using division or modulo operators.

+20 pts Be first Solve →
medium

Product except self

Return an array where output[i] is the product of all elements except nums[i], without using division.

+25 pts Be first Solve →
medium

Find all anagrams

Return all starting indices where any anagram of a given word appears as a substring.

+20 pts Be first Solve →
easy

Common Keys of Two Dictionaries

Implement a function that finds keys shared by two dictionaries and returns them sorted.

+8 pts Be first Solve →
hard

Largest Area Histogram Matrix

Given a binary matrix, compute the largest rectangle area consisting entirely of 1s.

+40 pts Be first Solve →
easy

Days Between Dates

Write a function that returns the number of days between two given dates.

+10 pts Be first Solve →
easy

Remove HTML tags

Remove all HTML tags from a string to extract clean text.

+10 pts Be first Solve →
medium

0/1 Knapsack

Implement the classic 0/1 Knapsack dynamic programming solution to maximize value under a weight capacity.

+30 pts Be first Solve →
easy

Armstrong Number Check

Implement a function that checks if a given integer is an Armstrong number.

+10 pts Be first Solve →
easy

Playing card class

Design a PlayingCard class with suit, rank, color, and equality/comparison magic methods.

+10 pts Be first Solve →
easy

Find Peak Index

Given a list of integers, return the index of any peak element where the value is not smaller than its neighbors.

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Python Code Samples

Copy-ready snippets — study, paste, and run in the browser IDE

Generate a Monthly Calendar PDF in Python

How to Atomically Write Files in Python with Temp File and Rename

Convert CSV Files to JSON in Python

Build a Command-Line To-Do List Application with Data Persistence in Python

Compress and Extract ZIP Files Programmatically in Python

Build a Network Ping Monitor in Python

Build a Complete Web Scraper with Requests and BeautifulSoup in Python

Extract Hyperlinks from Word Documents in Python

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Open free Python IDE Full editor · run & format in browser
main.py Preview 
# PythonSkillset IDE
def greet(name):
    return f"Hello, {name}!"

print(greet("world"))
Hello, world!
exit 0

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Formatter preview Demo
Before
def calculate( x,y ):
    result=x+y
    if result>10:
       print( "Big!" )
    else:
         print( "Small" )
    return result
After
def calculate(x, y):
    result = x + y
    if result > 10:
        print("Big!")
    else:
        print("Small")
    return result

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Tech Articles & Guides

Languages, tools, and notes worth keeping — sorted by topic with runnable examples when they help.

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Python

Why JSON Parsers Differ in Speed and Memory

Explore why Python's standard json module lags behind orjson and ujson in speed and memory. Learn the core optimization principles and when to choose the right parser for …

August 2026 8 min read Read article
Opinion

Python Needs a Standard CLI Framework

An argument for a unified, modern CLI framework in Python's standard library, highlighting the costs of …

August 2026 5 min
Python

Why Python Is Slow and Why It's Worth It

Explore the real reasons Python runs slower than compiled languages—interpreter overhead, dynamic typing, and the GIL—and …

August 2026 6 min

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