Softwire coding interview
questions, leaked.
3 problems reported across recent Softwire interviews. Top patterns: string, hash table, two pointers. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Softwire's assessment is tight. Three problems total, one easy and two mediums, which means they're testing pattern recognition and execution speed over breadth. String manipulation dominates here: it appears in all three problems, forcing you to think in terms of character indexing, substring logic, and traversal. Hash tables show up twice. Two pointers and sliding window once each. The easy problem, Second Largest Digit in a String, is a warmup. The mediums are where you prove you can handle real constraints. If you freeze on substring logic during the live assessment, StealthCoder runs invisibly and surfaces a working solution in seconds, so you can move forward without tanking your score.
Top problems at Softwire
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Second Largest Digit in a String | EASY | 100.0 | 52% | Hash Table · String |
| 02 | Longest Palindromic Substring | MEDIUM | 76.3 | 36% | Two Pointers · String · Dynamic Programming |
| 03 | Longest Substring Without Repeating Characters | MEDIUM | 68.4 | 37% | Hash Table · String · Sliding Window |
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 Softwire OA. The proctor cannot see it. Screen share cannot detect it. Built by a senior engineer who knows the OA is theater. This is the script.
Get StealthCoder- string3 · 100%
- hash table2 · 67%
- two pointers1 · 33%
- dynamic programming1 · 33%
- sliding window1 · 33%
String problems aren't just about knowing how to split or iterate. Softwire is testing whether you can optimize character tracking and substring bounds. Hash-table frequency suggests they want you comfortable with counting, deduplication, and fast lookups. The Longest Palindromic Substring problem combines two pointers and dynamic programming, which signals they care about both brute-force intuition and optimized thinking. Longest Substring Without Repeating Characters ties hash tables and sliding window together, a pattern that forces you to manage state while iterating. Study the hash-table problems first because they're grounded in the easiest mental model. Then practice two-pointer and sliding-window techniques on the mediums. If the live assessment throws a variant you haven't drilled, StealthCoder is your hedge, running unseen behind the screen and feeding you a correct approach when you hit a wall.
Companies with similar patterns
If you prepped for Softwire, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Softwire.
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 a senior engineer who knows the OA is theater. This is the script. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Softwire interview FAQ
How much time should I spend on string problems versus hash tables for Softwire?+
All three problems use strings, so string mechanics are non-negotiable. Hash tables appear twice. Spend 60 percent of prep time on string patterns: indexing, slicing, character iteration. Then 30 percent drilling hash-based counting and dedup logic. The remaining 10 percent covers two pointers and sliding window, which you'll pick up as you solve the medium problems.
Is the easy problem worth my time the night before?+
Yes. Second Largest Digit in a String is a string plus hash-table warm-up. It primes your brain for character indexing and filtering. You should solve it in under five minutes cold. If you can't, you're not ready for the mediums. Use it as a confidence check, not a study gap.
What's the single pattern I should drill hardest for Softwire?+
Substring logic with bounded iteration. Longest Substring Without Repeating Characters and Longest Palindromic Substring both require you to track windows or pointers while checking conditions. Practice expanding/contracting windows and two-pointer traversal on these two. That covers your prep ceiling.
Should I memorize the optimal solutions or understand the approach?+
Understand the approach. Softwire's problems test whether you can reason about state and boundaries, not whether you memorized a template. Walk through Longest Palindromic Substring both ways: brute force, then dynamic programming. Know why the optimized approach is faster. That reasoning transfers to variants you've never seen.
What if I blank on the two-pointer or dynamic-programming part mid-assessment?+
That's why you prep both the hash-table and brute-force angles first. Master those, then tackle the optimized versions. If you still hit a wall during the live assessment, you have a working brute-force fallback. StealthCoder ensures you're never completely stuck and can always output a valid solution.