Problem database last updated: June 20, 2025
5 problems · 1 Easy, 3 Medium, 1 Hard · Ranked #239 of 458
1 Easy
20% · avg 23%
3 Medium
60% · avg 59%
1 Hard
20% · avg 18%
Based on 5 reported problems, carwale interviews are in line with industry averages - 20% Hard vs 18% overall. The majority (60%) of questions are Medium difficulty, which is typical for companies that want to see solid fundamentals without excessive trick questions.
Compared to the industry average, carwale puts unusual emphasis on stack (40% of problems, 4.6x the industry average), string (60% of problems, 2.1x the industry average), dynamic-programming (40% of problems, 2x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are string (60%), array (60%), stack (40%), dynamic-programming (40%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Find Mirror Score Of A String You are given a string s. The mirror of a letter in the English alphabet is its corresponding letter when the alphabet is reversed (e.g., mirror of 'a' is 'z',... | Medium | Very Likely | stackhash-tablestring | Solve |
Trapping Rain Water Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining. | Hard | Likely | arraytwo-pointersdynamic-programming | Solve |
Zigzag Conversion The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better... | Medium | Likely | string | Solve |
Best Time to Buy and Sell Stock You are given an array prices where prices[i] is the price of a given stock on the ith day. | Easy | Likely | arraydynamic-programming | Solve |
Minimum Time Difference Given a list of 24-hour clock time points in "HH:MM" format, return the minimum minutes difference between any two time-points in the list. | Medium | Likely | arraymathstring | Solve |
Find Mirror Score Of A String
SolveYou are given a string s. The mirror of a letter in the English alphabet is its corresponding letter when the alphabet is reversed (e.g., mirror of 'a' is 'z',...
Trapping Rain Water
SolveGiven n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining.
Zigzag Conversion
SolveThe string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better...
Best Time to Buy and Sell Stock
SolveYou are given an array prices where prices[i] is the price of a given stock on the ith day.
Minimum Time Difference
SolveGiven a list of 24-hour clock time points in "HH:MM" format, return the minimum minutes difference between any two time-points in the list.
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent carwale interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
carwale interviews focus heavily on string, array, stack 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. carwale 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.
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carwale has been reported to ask 5 distinct coding problems. The most common topics are string, array, stack. 1 are Easy difficulty, 3 are Medium, and 1 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 5 reported problems, carwale interviews are in line with industry averages - 20% Hard vs 18% overall. 60% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
Start with the highest-frequency problems listed on this page. Focus on the core topics: string, array, stack. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
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