Design Interview Questions

Linked List Stack Design Doubly-Linked List Ordered Set

Rank

#146MediumFrequency: 100%

LRU Cache

Asked at Flipkart

Two Pointers Design Sorting Heap (Priority Queue)Data Stream

Rank

#295HardFrequency: 100%

Find Median from Data Stream

Asked at PayPal

Rank

#362MediumFrequency: 100%

Design Hit Counter

Array Binary Search Design Queue Data Stream

Rank

#348MediumFrequency: 93%

Design Tic-Tac-Toe

Array Hash Table Design Matrix Simulation

Rank

#460HardFrequency: 88%

LFU Cache

Asked at Salesforce

Rank

#1713MediumFrequency: 76%

Dot Product of Two Sparse Vectors

Array Hash Table Two Pointers Design

Rank

#3710HardFrequency: 72%

Design an Array Statistics Tracker

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

Rank

#381HardFrequency: 72%

Insert Delete GetRandom O(1) - Duplicates allowed

Rank

#244MediumFrequency: 63%

Shortest Word Distance II

Array Hash Table Two Pointers String Design

#10

Rank

#432HardFrequency: 63%

All O`one Data Structure

#11

Rank

#346EasyFrequency: 62%

Moving Average from Data Stream

Array Design Queue Data Stream

#12

Rank

#155MediumFrequency: 55%

Min Stack

Asked at Microsoft

Stack Design

#13

Rank

#232EasyFrequency: 51%

Implement Queue using Stacks

Stack Design Queue

#14

Rank

#380MediumFrequency: 51%

Insert Delete GetRandom O(1)

#15

Rank

#173MediumFrequency: 51%

Binary Search Tree Iterator

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

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

Linked List Stack Design Doubly-Linked List Ordered Set

Rank

#146MediumFrequency: 100%

LRU Cache

Asked at Flipkart

Two Pointers Design Sorting Heap (Priority Queue)Data Stream

Rank

#295HardFrequency: 100%

Find Median from Data Stream

Asked at PayPal

Rank

#362MediumFrequency: 100%

Design Hit Counter

Array Binary Search Design Queue Data Stream

Rank

#348MediumFrequency: 93%

Design Tic-Tac-Toe

Array Hash Table Design Matrix Simulation

Rank

#460HardFrequency: 88%

LFU Cache

Asked at Salesforce

Rank

#1713MediumFrequency: 76%

Dot Product of Two Sparse Vectors

Array Hash Table Two Pointers Design

Rank

#3710HardFrequency: 72%

Design an Array Statistics Tracker

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

Rank

#381HardFrequency: 72%

Insert Delete GetRandom O(1) - Duplicates allowed

Rank

#244MediumFrequency: 63%

Shortest Word Distance II

Array Hash Table Two Pointers String Design

#10

Rank

#432HardFrequency: 63%

All O`one Data Structure

#11

Rank

#346EasyFrequency: 62%

Moving Average from Data Stream

Array Design Queue Data Stream

#12

Rank

#155MediumFrequency: 55%

Min Stack

Asked at Microsoft

Stack Design

#13

Rank

#232EasyFrequency: 51%

Implement Queue using Stacks

Stack Design Queue

#14

Rank

#380MediumFrequency: 51%

Insert Delete GetRandom O(1)

#15

Rank

#173MediumFrequency: 51%

Binary Search Tree Iterator