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OpenAI LeetCode Interview Questions

Practice 45 real coding problems frequently asked in OpenAI technical interviews. Master these questions to ace your next OpenAI software engineering interview.

12 Easy
27 Medium
6 Hard

Top Topics at OpenAI

ArrayHash TableStringSortingHeap (Priority Queue)

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OpenAI Interview Problems

ProblemDifficultyDiffFrequencyTopicsAction
Analyze User Website Visit Pattern
100%
MediumM
100%
ArrayHash Table+1
Solve→
Valid Sudoku
91%
MediumM
91%
ArrayHash Table+1
Solve→
Roman to Integer
88%
EasyE
88%
Hash TableMath+1
Solve→
Longest Repeating Character Replacement
86%
MediumM
86%
Hash TableString+1
Solve→
Minimum Limit of Balls in a Bag
83%
MediumM
83%
ArrayBinary Search
Solve→
Maximum Matrix Sum
83%
MediumM
83%
ArrayGreedy+1
Solve→
Continuous Subarrays
78%
MediumM
78%
ArrayQueue+4
Solve→
Remove Duplicates from Sorted Array
75%
EasyE
75%
ArrayTwo Pointers
Solve→
Flatten Binary Tree to Linked List
75%
MediumM
75%
Linked ListStack+3
Solve→
Reorganize String
74%
MediumM
74%
Hash TableString+4
Solve→
First Missing Positive
71%
HardH
71%
ArrayHash Table
Solve→
N-Queens
71%
HardH
71%
ArrayBacktracking
Solve→
Range Sum of BST
70%
EasyE
70%
TreeDepth-First Search+2
Solve→
Group Anagrams
68%
MediumM
68%
ArrayHash Table+2
Solve→
Final Array State After K Multiplication Operations I
67%
EasyE
67%
ArrayMath+2
Solve→
Maximum Number of Events That Can Be Attended
67%
MediumM
67%
ArrayGreedy+2
Solve→
LRU Cache
66%
MediumM
66%
Hash TableLinked List+2
Solve→
Ransom Note
64%
EasyE
64%
Hash TableString+1
Solve→
Remove All Adjacent Duplicates in String II
63%
MediumM
63%
StringStack
Solve→
Coin Change II
62%
MediumM
62%
ArrayDynamic Programming
Solve→
Binary Tree Zigzag Level Order Traversal
62%
MediumM
62%
TreeBreadth-First Search+1
Solve→
Vertical Order Traversal of a Binary Tree
59%
HardH
59%
Hash TableTree+4
Solve→
Longest Common Prefix
59%
EasyE
59%
StringTrie
Solve→
Friends Of Appropriate Ages
57%
MediumM
57%
ArrayTwo Pointers+2
Solve→
Continuous Subarray Sum
57%
MediumM
57%
ArrayHash Table+2
Solve→

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Pascal's Triangle
57%
EasyE
57%
ArrayDynamic Programming
Solve→
Best Time to Buy and Sell Stock IV
56%
HardH
56%
ArrayDynamic Programming
Solve→
Find Score of an Array After Marking All Elements
55%
MediumM
55%
ArrayHash Table+3
Solve→
Length of Last Word
55%
EasyE
55%
String
Solve→
Zero Array Transformation III
50%
MediumM
50%
ArrayGreedy+3
Solve→
Find K Pairs with Smallest Sums
50%
MediumM
50%
ArrayHeap (Priority Queue)
Solve→
Populating Next Right Pointers in Each Node
48%
MediumM
48%
Linked ListTree+3
Solve→
Ways to Make a Fair Array
42%
MediumM
42%
ArrayPrefix Sum
Solve→
Word Ladder II
42%
HardH
42%
Hash TableString+2
Solve→
Find Longest Self-Contained Substring
38%
HardH
38%
Hash TableString+2
Solve→
4Sum
35%
MediumM
35%
ArrayTwo Pointers+1
Solve→
Gas Station
32%
MediumM
32%
ArrayGreedy
Solve→
Letter Combinations of a Phone Number
31%
MediumM
31%
Hash TableString+1
Solve→
Remove Letter To Equalize Frequency
28%
EasyE
28%
Hash TableString+1
Solve→
Implement Queue using Stacks
26%
EasyE
26%
StackDesign+1
Solve→
Merge Intervals
23%
MediumM
23%
ArraySorting
Solve→
Majority Element
22%
EasyE
22%
ArrayHash Table+3
Solve→
K-diff Pairs in an Array
21%
MediumM
21%
ArrayHash Table+3
Solve→
Check If a Word Occurs As a Prefix of Any Word in a Sentence
21%
EasyE
21%
Two PointersString+1
Solve→
Count Unhappy Friends
20%
MediumM
20%
ArraySimulation
Solve→

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Frequently Asked Questions

What LeetCode problems does OpenAI ask in interviews?

OpenAI commonly asks 45 coding problems in technical interviews, including Analyze User Website Visit Pattern, Valid Sudoku, Roman to Integer. The difficulty breakdown is 12 Easy, 27 Medium, and 6 Hard problems.

How should I prepare for a OpenAI coding interview?

Focus on the most frequently asked problems first, especially those with high frequency scores. OpenAI interviews typically emphasize Array and Hash Table. Practice explaining your thought process while coding.

What is the difficulty level of OpenAI coding interviews?

Based on our data, OpenAI interviews include 12 Easy (27%), 27 Medium (60%), and 6 Hard (13%) problems.

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