Practice Arena

Python Coding
Challenges

Write real Python in the browser. Instant feedback. From beginner to expert.

925 challenges 556 easy 323 medium 46 hard

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All Python Basics Strings & Text Lists & Arrays Dicts & Sets Functions & Closures OOP & Classes Data Structures & Algorithms Advanced Python Iterators & Generators Decorators & Context Managers Error Handling & Exceptions Regular Expressions Math & Number Theory Bit Manipulation Dynamic Programming Trees & Binary Trees Graphs & Graph Algorithms Recursion & Backtracking Greedy Algorithms Binary Search Two Pointers & Sliding Window Stacks & Queues Heaps & Priority Queues Linked Lists Matrix & 2D Arrays Datetime & Time Calculations Data Formats & Parsing SQL & SQLite Numpy & Vectorized Computing Cryptography & Hashing

Linked Lists medium

Prepend a new head

Insert value at the front of the list.

linked-list lists pointers

Linked Lists medium

Append a new tail

Add value after the last node.

linked-list lists pointers

Linked Lists medium

Palindrome linked values

Check whether values read the same forwards and backwards.

linked-list lists pointers

Linked Lists medium

Rotate list left by k

Move the first k nodes to the end (k may exceed length; use modulo).

linked-list lists pointers

Linked Lists medium

Merge two sorted lists

Merge two ascending integer lists into one sorted list.

linked-list lists pointers

Linked Lists medium

Remove duplicate values

Keep first occurrence of each value while preserving order.

linked-list lists pointers

Linked Lists medium

Pairwise sum of adjacent nodes

Sum each adjacent pair; keep a lone last node as-is.

linked-list lists pointers

Linked Lists medium

Count nodes equal to target

Count how many times target appears in the list.

linked-list lists pointers

Linked Lists medium

Zip two linked lists

Interleave values from a and b until both are exhausted.

linked-list lists pointers

Linked Lists medium

Split list at index

Return prefix and suffix tuples at index k.

linked-list lists pointers

Showing 1–10 of 10 challenges · medium · Linked Lists

Linked Lists — Python coding challenges

What you will find here

This page lists linked lists challenges — real Python problems you solve in the browser IDE with instant test feedback. Each challenge includes a clear brief, starter code, and automated checks.

Challenges vs tutorials and quizzes

Challenges test what you can build under constraints. For guided teaching, use our Python tutorials. For quick checks, try quizzes or copy snippets from code samples.