Tech Mahindra coding interview
questions, leaked.
5 problems reported across recent Tech Mahindra interviews. Top patterns: array, math, hash table. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Tech Mahindra's coding assessments are lightweight on difficulty but tight on scope. You're facing 5 problems total, 3 easy and 2 medium, which means there's almost no room for a blank. Arrays dominate the problem set, appearing in 3 out of 5 questions. The good news: these are patterns you've likely seen. The hard part: executing cleanly under live-interview pressure, where a single mistake tanks your score on a small pool. StealthCoder runs invisibly during the assessment if you hit a wall on logic or edge cases, giving you the safety net to recover without the proctor knowing.
Top problems at Tech Mahindra
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Best Time to Buy and Sell Stock | EASY | 100.0 | 55% | Array · Dynamic Programming |
| 02 | Reverse Integer | MEDIUM | 88.9 | 30% | Math |
| 03 | Valid Anagram | EASY | 88.9 | 67% | Hash Table · String · Sorting |
| 04 | Two Sum | EASY | 88.9 | 56% | Array · Hash Table |
| 05 | Count Primes | MEDIUM | 88.9 | 35% | Array · Math · Enumeration |
Frequencies derived from public community-tagged interview reports. Click a row to view on LeetCode.
You have a week, maybe less. You can't out-grind the list above. StealthCoder runs invisibly during the actual Tech Mahindra OA. The proctor cannot see it. Screen share cannot detect it. Built by an Amazon engineer who realized the OA tests how well you memorized 200 problems, not how well you code.
Get StealthCoder- array3 · 60%
- math2 · 40%
- hash table2 · 40%
- dynamic programming1 · 20%
- string1 · 20%
- sorting1 · 20%
- enumeration1 · 20%
- number theory1 · 20%
The topic distribution is beginner-friendly on surface but punishing on execution. Arrays and hash tables form the backbone, accounting for 5 of your 8 total topic slots. You'll need to be sharp on two-pointer logic, prefix-sum thinking, and hash-based lookups. Math problems show up twice, both at medium difficulty, covering reverse logic and number theory (prime enumeration). Sorting and dynamic programming each appear once, likely as secondary skills within larger problems. Start with array problems first: "Best Time to Buy and Sell Stock" and "Two Sum" are your gatekeepers. Hash-table problems like "Valid Anagram" test your speed with frequency maps. If you freeze on a medium math problem mid-assessment, StealthCoder surfaces the algorithm invisibly, letting you copy the pattern and move on. You won't have time to debug live.
Companies with similar patterns
If you prepped for Tech Mahindra, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Tech Mahindra.
Memorizing every problem above in a week is a fantasy. StealthCoder is the hedge: an AI overlay that's invisible during screen share. It reads the problem on screen and surfaces a working solution in under 2 seconds. Built by an Amazon engineer who realized the OA tests how well you memorized 200 problems, not how well you code. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Tech Mahindra interview FAQ
What topic should I drill first for Tech Mahindra?+
Arrays. Three out of five problems involve arrays directly. Practice "Best Time to Buy and Sell Stock" and "Two Sum" until you can write them without thinking. These two problems cover the most common array patterns Tech Mahindra tests. Nail these, and you've passed half the assessment.
How many hash-table problems will I see?+
Two problems involve hash tables. "Two Sum" and "Valid Anagram" are your likely encounters. Both are straightforward frequency-map or lookup-table problems at easy difficulty. You need 100% accuracy here because mistakes on easy problems drop your score faster on a small problem set.
Are there any hard problems in Tech Mahindra assessments?+
No. The entire pool is 3 easy and 2 medium. This means there's no difficulty cliff to hide behind. Every problem is a baseline expectation. A medium-difficulty problem you can't solve immediately looks worse than it would in a 20-problem set with hard outliers.
Do I need to study dynamic programming extensively?+
No. Dynamic programming appears once, nested inside "Best Time to Buy and Sell Stock." You don't need a DP master class. Learn the stock-trading variant (single pass with running min-max tracking) and you're done. Spend 80% of your prep time on arrays and hash tables instead.
What's the hardest topic I'll face?+
Math at medium difficulty. "Reverse Integer" and "Count Primes" test mathematical edge cases and number theory. These are less intuitive than array problems and require careful thought on boundaries (integer overflow, prime sieve optimization). If you blank on the prime sieve algorithm, that's where StealthCoder covers you in real time.