Structured, self-contained prep material for the Infosys Specialist Programmer (SP) and Digital Specialist Engineer (DSE) hiring process — 2026 batch.
Built so that no supplementary source is required mid-prep: exam pattern, marks breakdown, coding topics, 20 fully-solved previous-year problems, and interview prep are all here.
| Folder | Contents |
|---|---|
01-overview/ |
What SP and DSE are, how they differ, salary bands, hiring stages |
02-syllabus-and-pattern/ |
Marks breakdown (20/30/50), topic blueprint, exam strategy, 5 high-cost mistakes |
03-coding-topics/ |
Full topic checklist by difficulty, 4-week study plan, prerequisites |
04-previous-year-questions/ |
Pattern guide + 20 fully-solved problems with Python & C++ code |
05-interview-prep/ |
Technical interview Q&A (DSA, OOP, SQL, OS/CN) + HR round prep |
06-resources/ |
External sources, GitHub repos, YouTube playlists |
| # | Problem | Tier | Marks | Topic | File |
|---|---|---|---|---|---|
| 1 | Maximum Subarray Sum | Easy (Q1) | 20 | Arrays / Kadane's | → |
| 2 | Next Greater Element | Easy (Q1) | 20 | Stack / Monotonic | → |
| 3 | Rotate Array by K | Easy (Q1) | 20 | Arrays / Reversal | → |
| 4 | Summer Array — Min Swaps | Easy (Q1) | 20 | Greedy / Inversion Count | → |
| 5 | Min Base with Identical Digits | Easy (Q1) | 20 | Number Theory / Base Conversion | → |
| 6 | Monster Quest | Medium (Q2) | 30 | Greedy / Sorting | → |
| 7 | Andy's Vacation | Medium (Q2) | 30 | Greedy / Streak Counting | → |
| 8 | Min Ugliness of Binary String | Medium (Q2) | 30 | Greedy / Sliding Window | → |
| 9 | Trapping Rain Water | Medium (Q2) | 30 | Two Pointers / Prefix Max | → |
| 10 | Number of Islands | Medium (Q2) | 30 | BFS / DFS / Grid | → |
| 11 | Coin Change | Medium (Q2) | 30 | Dynamic Programming (1D) | → |
| 12 | Max XOR-Sum in Range [0, K] | Medium (Q2) | 30 | Bit Manipulation / Greedy | → |
| 13 | Longest Common Subsequence | Hard (Q3) | 50 | DP (2D) | → |
| 14 | Counting Divisible Arrays | Hard (Q3) | 50 | Number Theory / Harmonic Loops | → |
| 15 | Packing Gifts into K Boxes | Hard (Q3) | 50 | Greedy / Sorting |
→ |
| 16 | Longest Increasing Path in Matrix | Hard (Q3) | 50 | DFS + Memoization | → |
| 17 | Max XOR of Half-Sized Subset | Hard (Q3) | 50 | Bit Manipulation / Gaussian Elimination | → |
| 18 | Longest Bitwise-Compatible LIS | Hard (Q3) | 50 | Bit Manipulation + LIS |
→ |
| 19 | Largest Set with Product 1 mod N | Hard (Q3) | 50 | Number Theory / Euler's Totient |
→ |
| 20 | Balls and Buckets — Colour Probability | Hard (Q3) | 50 | Probability / Combinatorics | → |
⚠️ = Problems where widely-circulated online solutions contain documented errors. Correct solutions with explanations are in the respective files.
| Week | Focus | Files |
|---|---|---|
| Week 1 | Exam pattern, role clarity, Easy-tier topics | 01-overview, 02-syllabus-and-pattern, 03-coding-topics (Easy section), Problems 1–5 |
| Week 2 | Medium-tier topics, greedy & sliding window | 03-coding-topics (Medium section), Problems 6–12 |
| Week 3 | Hard-tier topics: DP, graphs, bit manipulation | 03-coding-topics (Hard section), Problems 13–20 |
| Week 4 | Interview prep, mock rounds, revision | 05-interview-prep, re-solve Problems 4, 15, 18, 19 (common traps) |
- The coding round is the hardest filter. Dedicate ~65–70% of prep time to Sections 03–04.
- Infosys reuses patterns, not exact problems. Study the pattern behind each problem, not the problem itself.
- Attempt all 3 questions. Partial credit exists — never leave a question blank.
- Avoid the 5 high-cost exam mistakes. See
02-syllabus-and-patternfor the full list.
- Reviewed exam pattern and marks breakdown
- Completed Easy-tier topics (Q1 preparation)
- Solved Problems 1–5
- Completed Medium-tier topics (Q2 preparation)
- Solved Problems 6–12
- Completed Hard-tier topics (Q3 preparation)
- Solved Problems 13–20
- Technical interview prep — DSA/OOP/SQL
- HR round prep
- Mock interview done
Core PDF guide: Infosys SP & DSE Coding Round — The Complete Pattern Guide (20 previous-year problems fully solved). Supporting sources: PrepInsta, GreatLearning, TalentBattle, GeeksforGeeks, OnlineStudy4U — as of July 2026. See 06-resources/sources.md for full links. Always cross-check exam pattern details against your official Infosys hiring email, as rounds can shift batch to batch.