Reddit Interview Questions — 6 DSA Problems

4 problems with full solutions in Python, Java, C++, JavaScript, Go, Rust.

Most frequently asked Reddit LeetCode questions for software engineering interviews.

• Word Ladder (HARD) — Hash Table, String, Breadth-First Search
• Number of Ways to Buy Pens and Pencils (MEDIUM) — Math, Enumeration
• LRU Cache (MEDIUM) — Hash Table, Linked List, Design, Doubly-Linked List
• Design Hit Counter (MEDIUM) — Array, Binary Search, Design, Queue, Data Stream
• Logger Rate Limiter (EASY) — Hash Table, Design, Data Stream
• Number of Islands (MEDIUM) — Array, Depth-First Search, Breadth-First Search, Union Find, Matrix