Toptal LeetCode Interview Questions
Practice 34 real coding problems frequently asked in Toptal technical interviews. Master these questions to ace your next Toptal software engineering interview.
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Toptal Interview Problems
| Problem | DifficultyDiff | Action |
|---|---|---|
Invalid Transactions 100% | MediumM | Solve→ |
Subarray Sum Equals K 92% | MediumM | Solve→ |
3Sum 90% | MediumM | Solve→ |
Diameter of Binary Tree 90% | EasyE | Solve→ |
Isomorphic Strings 88% | EasyE | Solve→ |
Accounts Merge 82% | MediumM | Solve→ |
Rank Transform of a Matrix 79% | HardH | Solve→ |
Zero Array Transformation II 76% | MediumM | Solve→ |
Continuous Subarrays 75% | MediumM | Solve→ |
Maximum Sum Circular Subarray 75% | MediumM | Solve→ |
Bus Routes 74% | HardH | Solve→ |
Largest Rectangle in Histogram 73% | HardH | Solve→ |
Median of Two Sorted Arrays 67% | HardH | Solve→ |
Reorganize String 67% | MediumM | Solve→ |
Number of Distinct Islands 63% | MediumM | Solve→ |
Binary Tree Vertical Order Traversal 61% | MediumM | Solve→ |
Top K Frequent Elements 61% | MediumM | Solve→ |
Check If N and Its Double Exist 61% | EasyE | Solve→ |
Find K Pairs with Smallest Sums 57% | MediumM | Solve→ |
Combination Sum II 57% | MediumM | Solve→ |
Alien Dictionary 53% | HardH | Solve→ |
Binary Tree Maximum Path Sum 48% | HardH | Solve→ |
Largest Number 44% | MediumM | Solve→ |
Adding Spaces to a String 43% | MediumM | Solve→ |
Split Array Largest Sum 42% | HardH | Solve→ |
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Zigzag Conversion 40% | MediumM | Solve→ |
Binary Search Tree Iterator 40% | MediumM | Solve→ |
Longest Repeating Character Replacement 33% | MediumM | Solve→ |
Remove All Adjacent Duplicates In String 31% | EasyE | Solve→ |
Ransom Note 31% | EasyE | Solve→ |
Kth Largest Element in an Array 26% | MediumM | Solve→ |
Ways to Make a Fair Array 23% | MediumM | Solve→ |
Maximum Profit in Job Scheduling 23% | HardH | Solve→ |
Minimum Window Substring 20% | HardH | Solve→ |
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Frequently Asked Questions
What LeetCode problems does Toptal ask in interviews?
Toptal commonly asks 34 coding problems in technical interviews, including Invalid Transactions, Subarray Sum Equals K, 3Sum. The difficulty breakdown is 5 Easy, 20 Medium, and 9 Hard problems.
How should I prepare for a Toptal coding interview?
Focus on the most frequently asked problems first, especially those with high frequency scores. Toptal interviews typically emphasize Array and Hash Table. Practice explaining your thought process while coding.
What is the difficulty level of Toptal coding interviews?
Based on our data, Toptal interviews include 5 Easy (15%), 20 Medium (59%), and 9 Hard (26%) problems.
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