Common Interview Questions and Answers
Practice the most frequently asked interview questions with expert answers, approach tips, and AI-powered feedback.
57.3K views•5mo ago
Implement a Map with Time Expiration (Heap/Set)
Data Structures
Asked at Apple
Hard
48.7K Users PracticedPractice with This Question
83.8K views•5mo ago
Convert Sorted Array to BST (Recursive)
Data Structures
Asked at Meta
Medium
71.2K Users PracticedPractice with This Question
96.7K views•5mo ago
Design a Twitter Feed (Conceptual Data Storage)
Data Structures
Asked at Microsoft
Medium
82.2K Users PracticedPractice with This Question
82.3K views•5mo ago
Remove Zero Sum Consecutive Nodes from Linked List
Data Structures
Asked at Amazon
Medium
69.9K Users PracticedPractice with This Question
100.9K views•5mo ago
Design a Phone Directory (Linked List/Array)
Data Structures
Asked at Stripe
Medium
85.8K Users PracticedPractice with This Question
107.7K views•5mo ago
Binary Tree Paths (DFS)
Data Structures
Asked at Salesforce
Easy
91.6K Users PracticedPractice with This Question
85.7K views•5mo ago
Minimum Absolute Difference in BST
Data Structures
Asked at Uber
Easy
72.9K Users PracticedPractice with This Question
85.2K views•5mo ago
Flatten a Multilevel Doubly Linked List (Stack)
Data Structures
Asked at IBM
Medium
72.4K Users PracticedPractice with This Question
149K views•5mo ago
Design a Set with $O(1)$ `insert`, `remove`, and `check`
Data Structures
Asked at Cisco
Easy
126.6K Users PracticedPractice with This Question
78.5K views•5mo ago
Design a Graph for Geospatial Data
Data Structures
Asked at Oracle
Medium
66.8K Users PracticedPractice with This Question