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LLD leetcode

LLD Questions by Difficulty and Company Tags

🟢 Easy-Level LLD

Table 7
Problem
Companies
Core Concepts
Amazon, Google
Array-based bucket list, basic hashing
Amazon, Facebook
Collision handling, chaining
Amazon
Simple class design, counters
There are no rows in this table

🟡 Medium-Level LLD

Table 8
Problem
Companies
Core Concepts
Amazon, Google, Facebook
DLL + HashMap, eviction policy
Google, Apple
Trie nodes, recursion
LinkedIn
Iterator wrapper
Amazon
Binary search in history
Apple, Microsoft
Matrix design, game engine logic
Bloomberg
Queue or bucket strategy
There are no rows in this table

🔴 Hard-Level LLD

Table 9
Problem
Companies
Core Concepts
Twitter, Facebook
Class design, heap, timelines
Google, Amazon
Frequency map + DLL
Facebook
DLL with bucket frequency
There are no rows in this table

🔧 Real-World Analogy Problems

Table 10
Problem
Use Case
Design Topic
Typing assistant
Trie + min-heap
Password generator
Iterators, combinations
Undo Stack, Browser Tabs
Map of stacks
Random selection system
Mapping + sampling
There are no rows in this table
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