Design Interview Questions

Master 17 design problems frequently asked in technical interviews. These questions test your understanding of designconcepts and are essential for coding interview success.

Total Problems

Easy

Medium

Hard

Max Stack

Asked at LinkedIn

Linked List Stack Design Doubly-Linked List Ordered Set

Rank

#146MediumFrequency: 100%

LRU Cache

Asked at Flipkart

Hash Table Linked List Design Doubly-Linked List

Rank

#295HardFrequency: 100%

Find Median from Data Stream

Asked at PayPal

Two Pointers Design Sorting Heap (Priority Queue)Data Stream

Rank

#362MediumFrequency: 100%

Design Hit Counter

Asked at Databricks

Array Binary Search Design Queue Data Stream

Rank

#348MediumFrequency: 93%

Design Tic-Tac-Toe

Asked at Databricks

Array Hash Table Design Matrix Simulation

Rank

#460HardFrequency: 88%

LFU Cache

Asked at Salesforce

Hash Table Linked List Design Doubly-Linked List

Rank

#1713MediumFrequency: 76%

Dot Product of Two Sparse Vectors

Asked at Meta

Array Hash Table Two Pointers Design

Rank

#3710HardFrequency: 72%

Design an Array Statistics Tracker

Asked at Amazon

Hash Table Binary Search Design Queue Heap (Priority Queue)Data Stream Ordered Set

Rank

#381HardFrequency: 72%

Insert Delete GetRandom O(1) - Duplicates allowed

Asked at LinkedIn

Array Hash Table Math Design Randomized

Rank

#244MediumFrequency: 63%

Shortest Word Distance II

Asked at LinkedIn

Array Hash Table Two Pointers String Design

#10

Rank

#432HardFrequency: 63%

All O`one Data Structure

Asked at LinkedIn

Hash Table Linked List Design Doubly-Linked List

#11

Rank

#346EasyFrequency: 62%

Moving Average from Data Stream

Asked at Meta

Array Design Queue Data Stream

#12

Rank

#155MediumFrequency: 55%

Min Stack

Asked at Microsoft

Stack Design

#13

Rank

#232EasyFrequency: 51%

Implement Queue using Stacks

Asked at Amazon

Stack Design Queue

#14

Rank

#380MediumFrequency: 51%

Insert Delete GetRandom O(1)

Asked at Amazon

Array Hash Table Math Design Randomized

#15

Rank

#173MediumFrequency: 51%

Binary Search Tree Iterator

Asked at Meta

Stack Tree Design Binary Search Tree Binary Tree Iterator

#16

Rank

#359EasyFrequency: 42%

Logger Rate Limiter

Asked at Google

Hash Table Design Data Stream

#17

Rank

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Design Interview Questions

Related Topics

Max Stack

LRU Cache

Find Median from Data Stream

Design Hit Counter

Design Tic-Tac-Toe

LFU Cache

Dot Product of Two Sparse Vectors

Design an Array Statistics Tracker

Insert Delete GetRandom O(1) - Duplicates allowed

Shortest Word Distance II

All O`one Data Structure

Moving Average from Data Stream

Min Stack

Implement Queue using Stacks

Insert Delete GetRandom O(1)

Binary Search Tree Iterator

Logger Rate Limiter

Master Design in Real Interviews