How often are these problems asked?
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent HP interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Problem database last updated: June 20, 2025
H
HP Coding Interview Questions
3 problems · 2 Easy, 1 Medium, 0 Hard · Ranked #350 of 458
Difficulty breakdown
2 Easy
67% · avg 23%
1 Medium
33% · avg 59%
0 Hard
0% · avg 18%
Top topics
string
66.7%2.4x
greedy
66.7%7.9x
sliding-window
33.3%7.1x
array
33.3%
hash-table
33.3%1.5x
Interview profile
Based on 3 reported problems, HP interviews are easier than average - only 0% Hard compared to 18% across all companies.
Compared to the industry average, HP puts unusual emphasis on greedy (66.7% of problems, 7.9x the industry average), string (66.7% of problems, 2.4x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are string (66.7%), greedy (66.7%), sliding-window (33.3%), array (33.3%). Problems below are sorted by frequency, the ones at the top are asked most often.
All 3 problems
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Minimum Recolors to Get K Consecutive Black Blocks You are given a 0-indexed string blocks of length n, where blocks[i] is either 'W' or 'B', representing the color of the ith block. The characters 'W' and 'B' d... | Easy | Very Likely | stringsliding-window | Solve |
Minimum Cost Homecoming of a Robot in a Grid There is an m x n grid, where (0, 0) is the top-left cell and (m - 1, n - 1) is the bottom-right cell. You are given an integer array startPos where startPos =... | Medium | Very Likely | arraygreedy | Solve |
Longest Palindrome Given a string s which consists of lowercase or uppercase letters, return the length of the longest palindrome that can be built with those letters. | Easy | Very Likely | hash-tablestringgreedy | Solve |
Minimum Recolors to Get K Consecutive Black Blocks
SolveYou are given a 0-indexed string blocks of length n, where blocks[i] is either 'W' or 'B', representing the color of the ith block. The characters 'W' and 'B' d...
EasyVery Likely
stringsliding-window
Minimum Cost Homecoming of a Robot in a Grid
SolveThere is an m x n grid, where (0, 0) is the top-left cell and (m - 1, n - 1) is the bottom-right cell. You are given an integer array startPos where startPos =...
MediumVery Likely
arraygreedy
Longest Palindrome
SolveGiven a string s which consists of lowercase or uppercase letters, return the length of the longest palindrome that can be built with those letters.
EasyVery Likely
hash-tablestringgreedy
Preparing for your HP coding interview
HP interviews focus heavily on string, greedy, sliding-window problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.
Beyond solving problems, practice explaining your approach. HP interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.
Looking for more companies? Browse all 458 companies in our directory, or sharpen your fundamentals with our free data structure visualizers and AI-powered DSA tutor.
Frequently Asked Questions
What coding problems does HP ask in interviews?add
HP has been reported to ask 3 distinct coding problems. The most common topics are string, greedy, sliding-window. 2 are Easy difficulty, 1 are Medium, and 0 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
How hard are HP coding interviews?add
Based on 3 reported problems, HP interviews are easier than average - only 0% Hard compared to 18% across all companies. 33% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
How should I prepare for a HP coding interview?add
Start with the highest-frequency problems listed on this page. Focus on the core topics: string, greedy, sliding-window. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
Other companies to explore
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